Grade 11 Exam > Grade 11 Notes > Chemistry for Grade 11 > Past Year Paper with solution: Chemistry, 2017, Class 11
Past Year Paper with solution: Chemistry, 2017, Class 11 | Chemistry for Grade 11 PDF Download
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1 C B S E C l a s s – X I C H E M I S T R Y T i m e a l l o w e d : 3 h o u r s , M a x i m u m M a r k s : 7 0 G e n e r a l I n s t r u c t i o n s : a ) A l l t h e q u e s t i o n s a r e c o m p u l s o r y . b ) T h e r e a r e 2 6 q u e s t i o n s i n t o t a l . c ) Q u e s t i o n s 1 t o 5 a r e v e r y s h o r t a n s w e r t y p e q u e s t i o n s a n d c a r r y o n e m a r k e a c h . d ) Q u e s t i o n s 6 t o 1 0 c a r r y t w o m a r k s e a c h . e ) Q u e s t i o n s 1 1 t o 2 2 c a r r y t h r e e m a r k s e a c h . f ) Q u e s t i o n s 2 3 i s v a l u e b a s e d q u e s t i o n c a r r y i n g f o u r m a r k s . g ) Q u e s t i o n s 2 4 t o 2 6 c a r r y f i v e m a r k s e a c h . h ) T h e r e i s n o o v e r a l l c h o i c e . H o w e v e r , a n i n t e r n a l c h o i c e h a s b e e n p r o v i d e d i n o n e q u e s t i o n o f t w o m a r k s , o n e q u e s t i o n o f t h r e e m a r k s a n d a l l t h r e e q u e s t i o n s i n f i v e m a r k s e a c h . Y o u h a v e t o a t t e m p t o n l y o n e o f t h e c h o i c e s i n s u c h q u e s t i o n s . i ) U s e o f c a l c u l a t o r s i s n o t p e r m i t t e d . H o w e v e r , y o u m a y u s e l o g t a b l e s i f n e c e s s a r y . 1 . I f a m e t a l i s h i g h e r t h a n a p a r t i c u l a r m e t a l i n e l e c t r o c h e m i c a l s e r i e s , w i l l i t b e s t r o n g e r r e d u c i n g a g e n t o r w e a k e r r e d u c i n g a g e n t ? W h y ? A n s . I t w i l l b e a w e a k e r r e d u c i n g a g e n t i f e l e c t r o c h e m i c a l s e r i e s h a s e l e m e n t s i n d e c r e a s i n g o r d e r o f t h e i r r e d u c t i o n p o t e n t i a l . 2 . I f t h e c r i t i c a l t e m p e r a t u r e f o r c a r b o n d i o x i d e a n d m e t h a n e a r e 3 1 . 1 0 C a n d – 8 1 . 9 0 C r e s p e c t i v e l y , t h e n w h i c h o f t h e s e h a s s t r o n g i n t e r m o l e c u l a r f o r c e s ? G i v e r e a s o n . A n s . T h e i n t e r m o l e c u l a r f o r c e s i n c a r b o n d i o x i d e a r e m o r e t h a n i n m e t h a n e m o l e c u l e s b e c a u s e o f g r e a t e r p o l a r i t y . 3 . W h i c h o f t h e s e c o n t a i n t h e l a r g e s t n u m b e r o f a t o m s – 1 . 0 g L i ( s ) a n d 1 g N a ( s ) ? A n s . 1 . 0 g L i . Page 2 C B S E C l a s s – X I C H E M I S T R Y T i m e a l l o w e d : 3 h o u r s , M a x i m u m M a r k s : 7 0 G e n e r a l I n s t r u c t i o n s : a ) A l l t h e q u e s t i o n s a r e c o m p u l s o r y . b ) T h e r e a r e 2 6 q u e s t i o n s i n t o t a l . c ) Q u e s t i o n s 1 t o 5 a r e v e r y s h o r t a n s w e r t y p e q u e s t i o n s a n d c a r r y o n e m a r k e a c h . d ) Q u e s t i o n s 6 t o 1 0 c a r r y t w o m a r k s e a c h . e ) Q u e s t i o n s 1 1 t o 2 2 c a r r y t h r e e m a r k s e a c h . f ) Q u e s t i o n s 2 3 i s v a l u e b a s e d q u e s t i o n c a r r y i n g f o u r m a r k s . g ) Q u e s t i o n s 2 4 t o 2 6 c a r r y f i v e m a r k s e a c h . h ) T h e r e i s n o o v e r a l l c h o i c e . H o w e v e r , a n i n t e r n a l c h o i c e h a s b e e n p r o v i d e d i n o n e q u e s t i o n o f t w o m a r k s , o n e q u e s t i o n o f t h r e e m a r k s a n d a l l t h r e e q u e s t i o n s i n f i v e m a r k s e a c h . Y o u h a v e t o a t t e m p t o n l y o n e o f t h e c h o i c e s i n s u c h q u e s t i o n s . i ) U s e o f c a l c u l a t o r s i s n o t p e r m i t t e d . H o w e v e r , y o u m a y u s e l o g t a b l e s i f n e c e s s a r y . 1 . I f a m e t a l i s h i g h e r t h a n a p a r t i c u l a r m e t a l i n e l e c t r o c h e m i c a l s e r i e s , w i l l i t b e s t r o n g e r r e d u c i n g a g e n t o r w e a k e r r e d u c i n g a g e n t ? W h y ? A n s . I t w i l l b e a w e a k e r r e d u c i n g a g e n t i f e l e c t r o c h e m i c a l s e r i e s h a s e l e m e n t s i n d e c r e a s i n g o r d e r o f t h e i r r e d u c t i o n p o t e n t i a l . 2 . I f t h e c r i t i c a l t e m p e r a t u r e f o r c a r b o n d i o x i d e a n d m e t h a n e a r e 3 1 . 1 0 C a n d – 8 1 . 9 0 C r e s p e c t i v e l y , t h e n w h i c h o f t h e s e h a s s t r o n g i n t e r m o l e c u l a r f o r c e s ? G i v e r e a s o n . A n s . T h e i n t e r m o l e c u l a r f o r c e s i n c a r b o n d i o x i d e a r e m o r e t h a n i n m e t h a n e m o l e c u l e s b e c a u s e o f g r e a t e r p o l a r i t y . 3 . W h i c h o f t h e s e c o n t a i n t h e l a r g e s t n u m b e r o f a t o m s – 1 . 0 g L i ( s ) a n d 1 g N a ( s ) ? A n s . 1 . 0 g L i . 4 . P r e d i c t t h e s h a p e o f t h e P H 3 m o l e c u l e a c c o r d i n g t o V S E P R t h e o r y . A n s . T r i g o n a l p y r a m i d a l . 5 . G i v e r e a s o n : “ M e t a l l i c h y d r i d e s a r e u s e d f o r s t o r i n g h y d r o g e n ” . A n s . M e t a l l i c h y d r i d e s t r a p h y d r o g e n i n t h e i r v o i d s f o r m i n g i n t e r s t i t i a l h y d r i d e s , t h u s t h e y c a n b e u s e d f o r s t o r i n g h y d r o g e n . 6 . C o n v e r t : a ) C a r b o n t o b e n z e n e . b ) C a l c i u m c a r b i d e t o o x a l i c a c i d . A n s . 7 . H o w w o u l d y o u c a l c u l a t e t h e p H o f 0 . 0 0 1 M N a O H ? O r R a m e s h f o r g o t t o a d d t h e r e a c t i o n m i x t u r e t o t h e r o u n d b o t t o m e d f l a s k a t 2 7 o C b u t i n s t e a d h e p l a c e d t h e f l a s k o n t h e f l a m e . B u t a f t e r s o m e t i m e , h e r e a l i z e d h i s m i s t a k e a n d u s e d p y r o m e t e r a n d f o u n d t h e t e m p e r a t u r e o f t h e f l a s k w h i c h w a s 4 7 7 o C . W h a t f r a c t i o n o f a i r w o u l d h a v e b e e n e x p e l l e d o u t ? A n s . [ N a O H ] = [ ] = 0 . 0 0 1 M Page 3 C B S E C l a s s – X I C H E M I S T R Y T i m e a l l o w e d : 3 h o u r s , M a x i m u m M a r k s : 7 0 G e n e r a l I n s t r u c t i o n s : a ) A l l t h e q u e s t i o n s a r e c o m p u l s o r y . b ) T h e r e a r e 2 6 q u e s t i o n s i n t o t a l . c ) Q u e s t i o n s 1 t o 5 a r e v e r y s h o r t a n s w e r t y p e q u e s t i o n s a n d c a r r y o n e m a r k e a c h . d ) Q u e s t i o n s 6 t o 1 0 c a r r y t w o m a r k s e a c h . e ) Q u e s t i o n s 1 1 t o 2 2 c a r r y t h r e e m a r k s e a c h . f ) Q u e s t i o n s 2 3 i s v a l u e b a s e d q u e s t i o n c a r r y i n g f o u r m a r k s . g ) Q u e s t i o n s 2 4 t o 2 6 c a r r y f i v e m a r k s e a c h . h ) T h e r e i s n o o v e r a l l c h o i c e . H o w e v e r , a n i n t e r n a l c h o i c e h a s b e e n p r o v i d e d i n o n e q u e s t i o n o f t w o m a r k s , o n e q u e s t i o n o f t h r e e m a r k s a n d a l l t h r e e q u e s t i o n s i n f i v e m a r k s e a c h . Y o u h a v e t o a t t e m p t o n l y o n e o f t h e c h o i c e s i n s u c h q u e s t i o n s . i ) U s e o f c a l c u l a t o r s i s n o t p e r m i t t e d . H o w e v e r , y o u m a y u s e l o g t a b l e s i f n e c e s s a r y . 1 . I f a m e t a l i s h i g h e r t h a n a p a r t i c u l a r m e t a l i n e l e c t r o c h e m i c a l s e r i e s , w i l l i t b e s t r o n g e r r e d u c i n g a g e n t o r w e a k e r r e d u c i n g a g e n t ? W h y ? A n s . I t w i l l b e a w e a k e r r e d u c i n g a g e n t i f e l e c t r o c h e m i c a l s e r i e s h a s e l e m e n t s i n d e c r e a s i n g o r d e r o f t h e i r r e d u c t i o n p o t e n t i a l . 2 . I f t h e c r i t i c a l t e m p e r a t u r e f o r c a r b o n d i o x i d e a n d m e t h a n e a r e 3 1 . 1 0 C a n d – 8 1 . 9 0 C r e s p e c t i v e l y , t h e n w h i c h o f t h e s e h a s s t r o n g i n t e r m o l e c u l a r f o r c e s ? G i v e r e a s o n . A n s . T h e i n t e r m o l e c u l a r f o r c e s i n c a r b o n d i o x i d e a r e m o r e t h a n i n m e t h a n e m o l e c u l e s b e c a u s e o f g r e a t e r p o l a r i t y . 3 . W h i c h o f t h e s e c o n t a i n t h e l a r g e s t n u m b e r o f a t o m s – 1 . 0 g L i ( s ) a n d 1 g N a ( s ) ? A n s . 1 . 0 g L i . 4 . P r e d i c t t h e s h a p e o f t h e P H 3 m o l e c u l e a c c o r d i n g t o V S E P R t h e o r y . A n s . T r i g o n a l p y r a m i d a l . 5 . G i v e r e a s o n : “ M e t a l l i c h y d r i d e s a r e u s e d f o r s t o r i n g h y d r o g e n ” . A n s . M e t a l l i c h y d r i d e s t r a p h y d r o g e n i n t h e i r v o i d s f o r m i n g i n t e r s t i t i a l h y d r i d e s , t h u s t h e y c a n b e u s e d f o r s t o r i n g h y d r o g e n . 6 . C o n v e r t : a ) C a r b o n t o b e n z e n e . b ) C a l c i u m c a r b i d e t o o x a l i c a c i d . A n s . 7 . H o w w o u l d y o u c a l c u l a t e t h e p H o f 0 . 0 0 1 M N a O H ? O r R a m e s h f o r g o t t o a d d t h e r e a c t i o n m i x t u r e t o t h e r o u n d b o t t o m e d f l a s k a t 2 7 o C b u t i n s t e a d h e p l a c e d t h e f l a s k o n t h e f l a m e . B u t a f t e r s o m e t i m e , h e r e a l i z e d h i s m i s t a k e a n d u s e d p y r o m e t e r a n d f o u n d t h e t e m p e r a t u r e o f t h e f l a s k w h i c h w a s 4 7 7 o C . W h a t f r a c t i o n o f a i r w o u l d h a v e b e e n e x p e l l e d o u t ? A n s . [ N a O H ] = [ ] = 0 . 0 0 1 M 8 . S t a t e t h e d i f f e r e n c e b e t w e e n c l a s s i c a l s m o g a n d p h o t o c h e m i c a l s m o g . A n s . C l a s s i c a l s m o g P h o t o c h e m i c a l s m o g O c c u r s i n c o o l h u m i d c l i m a t e . O c c u r s i n w a r m , d r y a n d s u n n y c l i m a t e . I t i s a m i x t u r e o f s m o k e , f o g a n d s u l p h u r d i o x i d e . C o m p o n e n t s o f p h o t o c h e m i c a l s m o g r e s u l t f r o m t h e a c t i o n o f s u n l i g h t o n u n s a t u r a t e d h y d r o c a r b o n s & o x i d e s o f n i t r o g e n p r o d u c e d b y a u t o m o b i l e s & f a c t o r i e s . 9 . G i v e n t h e e l e c t r o d e r e d u c t i o n p o t e n t i a l s o f f o u r m e t a l l i c e l e m e n t s A , B , C a n d D = + 0 . 7 9 , - 0 . 7 4 , 1 . 0 8 a n d – 0 . 3 1 V . A r r a n g e t h e s e i n o r d e r o f d e c r e a s i n g e l e c t r o p o s i t i v e c h a r a c t e r a n d s u p p o r t y o u a n s w e r . A n s . H i g h e r t h e e l e c t r o d e p o t e n t i a l l o w e r i s i t s t e n d e n c y t o l o s e e l e c t r o n s a n d t h e r e f o r e , l o w e r i s t h e e l e c t r o p o s i t i v e c h a r a c t e r o f t h e m e t a l . S o t h e m e t a l s a r e a r r a n g e d a s : B , D , A , C . Page 4 C B S E C l a s s – X I C H E M I S T R Y T i m e a l l o w e d : 3 h o u r s , M a x i m u m M a r k s : 7 0 G e n e r a l I n s t r u c t i o n s : a ) A l l t h e q u e s t i o n s a r e c o m p u l s o r y . b ) T h e r e a r e 2 6 q u e s t i o n s i n t o t a l . c ) Q u e s t i o n s 1 t o 5 a r e v e r y s h o r t a n s w e r t y p e q u e s t i o n s a n d c a r r y o n e m a r k e a c h . d ) Q u e s t i o n s 6 t o 1 0 c a r r y t w o m a r k s e a c h . e ) Q u e s t i o n s 1 1 t o 2 2 c a r r y t h r e e m a r k s e a c h . f ) Q u e s t i o n s 2 3 i s v a l u e b a s e d q u e s t i o n c a r r y i n g f o u r m a r k s . g ) Q u e s t i o n s 2 4 t o 2 6 c a r r y f i v e m a r k s e a c h . h ) T h e r e i s n o o v e r a l l c h o i c e . H o w e v e r , a n i n t e r n a l c h o i c e h a s b e e n p r o v i d e d i n o n e q u e s t i o n o f t w o m a r k s , o n e q u e s t i o n o f t h r e e m a r k s a n d a l l t h r e e q u e s t i o n s i n f i v e m a r k s e a c h . Y o u h a v e t o a t t e m p t o n l y o n e o f t h e c h o i c e s i n s u c h q u e s t i o n s . i ) U s e o f c a l c u l a t o r s i s n o t p e r m i t t e d . H o w e v e r , y o u m a y u s e l o g t a b l e s i f n e c e s s a r y . 1 . I f a m e t a l i s h i g h e r t h a n a p a r t i c u l a r m e t a l i n e l e c t r o c h e m i c a l s e r i e s , w i l l i t b e s t r o n g e r r e d u c i n g a g e n t o r w e a k e r r e d u c i n g a g e n t ? W h y ? A n s . I t w i l l b e a w e a k e r r e d u c i n g a g e n t i f e l e c t r o c h e m i c a l s e r i e s h a s e l e m e n t s i n d e c r e a s i n g o r d e r o f t h e i r r e d u c t i o n p o t e n t i a l . 2 . I f t h e c r i t i c a l t e m p e r a t u r e f o r c a r b o n d i o x i d e a n d m e t h a n e a r e 3 1 . 1 0 C a n d – 8 1 . 9 0 C r e s p e c t i v e l y , t h e n w h i c h o f t h e s e h a s s t r o n g i n t e r m o l e c u l a r f o r c e s ? G i v e r e a s o n . A n s . T h e i n t e r m o l e c u l a r f o r c e s i n c a r b o n d i o x i d e a r e m o r e t h a n i n m e t h a n e m o l e c u l e s b e c a u s e o f g r e a t e r p o l a r i t y . 3 . W h i c h o f t h e s e c o n t a i n t h e l a r g e s t n u m b e r o f a t o m s – 1 . 0 g L i ( s ) a n d 1 g N a ( s ) ? A n s . 1 . 0 g L i . 4 . P r e d i c t t h e s h a p e o f t h e P H 3 m o l e c u l e a c c o r d i n g t o V S E P R t h e o r y . A n s . T r i g o n a l p y r a m i d a l . 5 . G i v e r e a s o n : “ M e t a l l i c h y d r i d e s a r e u s e d f o r s t o r i n g h y d r o g e n ” . A n s . M e t a l l i c h y d r i d e s t r a p h y d r o g e n i n t h e i r v o i d s f o r m i n g i n t e r s t i t i a l h y d r i d e s , t h u s t h e y c a n b e u s e d f o r s t o r i n g h y d r o g e n . 6 . C o n v e r t : a ) C a r b o n t o b e n z e n e . b ) C a l c i u m c a r b i d e t o o x a l i c a c i d . A n s . 7 . H o w w o u l d y o u c a l c u l a t e t h e p H o f 0 . 0 0 1 M N a O H ? O r R a m e s h f o r g o t t o a d d t h e r e a c t i o n m i x t u r e t o t h e r o u n d b o t t o m e d f l a s k a t 2 7 o C b u t i n s t e a d h e p l a c e d t h e f l a s k o n t h e f l a m e . B u t a f t e r s o m e t i m e , h e r e a l i z e d h i s m i s t a k e a n d u s e d p y r o m e t e r a n d f o u n d t h e t e m p e r a t u r e o f t h e f l a s k w h i c h w a s 4 7 7 o C . W h a t f r a c t i o n o f a i r w o u l d h a v e b e e n e x p e l l e d o u t ? A n s . [ N a O H ] = [ ] = 0 . 0 0 1 M 8 . S t a t e t h e d i f f e r e n c e b e t w e e n c l a s s i c a l s m o g a n d p h o t o c h e m i c a l s m o g . A n s . C l a s s i c a l s m o g P h o t o c h e m i c a l s m o g O c c u r s i n c o o l h u m i d c l i m a t e . O c c u r s i n w a r m , d r y a n d s u n n y c l i m a t e . I t i s a m i x t u r e o f s m o k e , f o g a n d s u l p h u r d i o x i d e . C o m p o n e n t s o f p h o t o c h e m i c a l s m o g r e s u l t f r o m t h e a c t i o n o f s u n l i g h t o n u n s a t u r a t e d h y d r o c a r b o n s & o x i d e s o f n i t r o g e n p r o d u c e d b y a u t o m o b i l e s & f a c t o r i e s . 9 . G i v e n t h e e l e c t r o d e r e d u c t i o n p o t e n t i a l s o f f o u r m e t a l l i c e l e m e n t s A , B , C a n d D = + 0 . 7 9 , - 0 . 7 4 , 1 . 0 8 a n d – 0 . 3 1 V . A r r a n g e t h e s e i n o r d e r o f d e c r e a s i n g e l e c t r o p o s i t i v e c h a r a c t e r a n d s u p p o r t y o u a n s w e r . A n s . H i g h e r t h e e l e c t r o d e p o t e n t i a l l o w e r i s i t s t e n d e n c y t o l o s e e l e c t r o n s a n d t h e r e f o r e , l o w e r i s t h e e l e c t r o p o s i t i v e c h a r a c t e r o f t h e m e t a l . S o t h e m e t a l s a r e a r r a n g e d a s : B , D , A , C . 1 0 . G i v e a n y t h r e e f a c t o r s f a v o u r a b l e f o r t h e f o r m a t i o n o f i o n i c b o n d . A n s . ( a ) L o w i o n i z a t i o n e n t h a l p y o f t h e m e t a l a t o m . ( b ) H i g h e l e c t r o n g a i n e n t h a l p y o f t h e n o n - m e t a l a t o m . ( c ) H i g h l a t t i c e e n t h a l p y o f t h e c o m p o u n d f o r m e d . 1 1 . i . W h i c h o f t h e t w o i s m o r e s t a b l e o r a n d w h y ? i i . A l l b o n d s i n P C l 5 a r e n o t e q u a l . E x p l a i n . i i i . W h i c h o f t h e t w o i s m o r e i o n i c - N a C l o r N a I a n d w h y ? A n s . ( i ) i s m o r e s t a b l e t h a n a s i t c o n t a i n s n o e l e c t r o n i n a n t i b o n d i n g M O w h i l e l a t t e r c o n t a i n s a n e l e c t r o n i n a n t i b o n d i n g M O m a k i n g i t l e s s s t a b l e . ( i i ) P C l 5 c o n t a i n s a x i a l a n d e q u a t o r i a l b o n d s . A x i a l b o n d s a r e l o n g e r t h a n e q u a t o r i a l b o n d s a s t h e y f a c e m o r e r e p u l s i o n f r o m e q u a t o r i a l b o n d s . H e n c e a x i a l b o n d s a r e w e a k e r t h a n e q u a t o r i a l b o n d s . ( i i i ) N a I i s m o r e c o v a l e n t d u e t o h i g h p o l a r i z a b i l i t y o f i o d i d e t h a n c h l o r i d e i o n . 1 2 . E x p l a i n t h e f o l l o w i n g t e r m s w i t h a n e x a m p l e e a c h : i ) O p e n s y s t e m i i ) I s o l a t e d s y s t e m i i i ) C l o s e d s y s t e m A n s . ( i ) I n a n o p e n s y s t e m , t h e r e i s e x c h a n g e o f e n e r g y a n d m a t t e r b e t w e e n s y s t e m a n d s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a n o p e n b e a k e r i s a n e x a m p l e o f a n o p e n s y s t e m . H e r e t h e b o u n d a r y i s a n i m a g i n a r y s u r f a c e e n c l o s i n g t h e b e a k e r a n d r e a c t a n t s . ( i i ) I n a c l o s e d s y s t e m , t h e r e i s n o e x c h a n g e o f m a t t e r , b u t e x c h a n g e o f e n e r g y i s p o s s i b l e b e t w e e n s y s t e m a n d t h e s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a c l o s e d v e s s e l m a d e o f c o n d u c t i n g m a t e r i a l e . g . c o p p e r o r s t e e l i s a n e x a m p l e o f a c l o s e d s y s t e m . ( i i i ) I n a n i s o l a t e d s y s t e m , t h e r e i s n o e x c h a n g e o f e n e r g y o r m a t t e r b e t w e e n t h e s y s t e m a n d t h e s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a t h e r m o s f l a s k o r a n y o t h e r c l o s e d i n s u l a t e d v e s s e l i s a n e x a m p l e o f a n i s o l a t e d s y s t e m . 1 3 . D r a w t h e s t r u c t u r e o f t h e f o l l o w i n g I U P A C c o m p o u n d s : a ) 2 , 8 - D i m e t h y l - 3 , 6 - d e c a d i e n e b ) 4 - E t h y l - 2 , 6 - d i m e t h y l - d e c - 4 - e n e Page 5 C B S E C l a s s – X I C H E M I S T R Y T i m e a l l o w e d : 3 h o u r s , M a x i m u m M a r k s : 7 0 G e n e r a l I n s t r u c t i o n s : a ) A l l t h e q u e s t i o n s a r e c o m p u l s o r y . b ) T h e r e a r e 2 6 q u e s t i o n s i n t o t a l . c ) Q u e s t i o n s 1 t o 5 a r e v e r y s h o r t a n s w e r t y p e q u e s t i o n s a n d c a r r y o n e m a r k e a c h . d ) Q u e s t i o n s 6 t o 1 0 c a r r y t w o m a r k s e a c h . e ) Q u e s t i o n s 1 1 t o 2 2 c a r r y t h r e e m a r k s e a c h . f ) Q u e s t i o n s 2 3 i s v a l u e b a s e d q u e s t i o n c a r r y i n g f o u r m a r k s . g ) Q u e s t i o n s 2 4 t o 2 6 c a r r y f i v e m a r k s e a c h . h ) T h e r e i s n o o v e r a l l c h o i c e . H o w e v e r , a n i n t e r n a l c h o i c e h a s b e e n p r o v i d e d i n o n e q u e s t i o n o f t w o m a r k s , o n e q u e s t i o n o f t h r e e m a r k s a n d a l l t h r e e q u e s t i o n s i n f i v e m a r k s e a c h . Y o u h a v e t o a t t e m p t o n l y o n e o f t h e c h o i c e s i n s u c h q u e s t i o n s . i ) U s e o f c a l c u l a t o r s i s n o t p e r m i t t e d . H o w e v e r , y o u m a y u s e l o g t a b l e s i f n e c e s s a r y . 1 . I f a m e t a l i s h i g h e r t h a n a p a r t i c u l a r m e t a l i n e l e c t r o c h e m i c a l s e r i e s , w i l l i t b e s t r o n g e r r e d u c i n g a g e n t o r w e a k e r r e d u c i n g a g e n t ? W h y ? A n s . I t w i l l b e a w e a k e r r e d u c i n g a g e n t i f e l e c t r o c h e m i c a l s e r i e s h a s e l e m e n t s i n d e c r e a s i n g o r d e r o f t h e i r r e d u c t i o n p o t e n t i a l . 2 . I f t h e c r i t i c a l t e m p e r a t u r e f o r c a r b o n d i o x i d e a n d m e t h a n e a r e 3 1 . 1 0 C a n d – 8 1 . 9 0 C r e s p e c t i v e l y , t h e n w h i c h o f t h e s e h a s s t r o n g i n t e r m o l e c u l a r f o r c e s ? G i v e r e a s o n . A n s . T h e i n t e r m o l e c u l a r f o r c e s i n c a r b o n d i o x i d e a r e m o r e t h a n i n m e t h a n e m o l e c u l e s b e c a u s e o f g r e a t e r p o l a r i t y . 3 . W h i c h o f t h e s e c o n t a i n t h e l a r g e s t n u m b e r o f a t o m s – 1 . 0 g L i ( s ) a n d 1 g N a ( s ) ? A n s . 1 . 0 g L i . 4 . P r e d i c t t h e s h a p e o f t h e P H 3 m o l e c u l e a c c o r d i n g t o V S E P R t h e o r y . A n s . T r i g o n a l p y r a m i d a l . 5 . G i v e r e a s o n : “ M e t a l l i c h y d r i d e s a r e u s e d f o r s t o r i n g h y d r o g e n ” . A n s . M e t a l l i c h y d r i d e s t r a p h y d r o g e n i n t h e i r v o i d s f o r m i n g i n t e r s t i t i a l h y d r i d e s , t h u s t h e y c a n b e u s e d f o r s t o r i n g h y d r o g e n . 6 . C o n v e r t : a ) C a r b o n t o b e n z e n e . b ) C a l c i u m c a r b i d e t o o x a l i c a c i d . A n s . 7 . H o w w o u l d y o u c a l c u l a t e t h e p H o f 0 . 0 0 1 M N a O H ? O r R a m e s h f o r g o t t o a d d t h e r e a c t i o n m i x t u r e t o t h e r o u n d b o t t o m e d f l a s k a t 2 7 o C b u t i n s t e a d h e p l a c e d t h e f l a s k o n t h e f l a m e . B u t a f t e r s o m e t i m e , h e r e a l i z e d h i s m i s t a k e a n d u s e d p y r o m e t e r a n d f o u n d t h e t e m p e r a t u r e o f t h e f l a s k w h i c h w a s 4 7 7 o C . W h a t f r a c t i o n o f a i r w o u l d h a v e b e e n e x p e l l e d o u t ? A n s . [ N a O H ] = [ ] = 0 . 0 0 1 M 8 . S t a t e t h e d i f f e r e n c e b e t w e e n c l a s s i c a l s m o g a n d p h o t o c h e m i c a l s m o g . A n s . C l a s s i c a l s m o g P h o t o c h e m i c a l s m o g O c c u r s i n c o o l h u m i d c l i m a t e . O c c u r s i n w a r m , d r y a n d s u n n y c l i m a t e . I t i s a m i x t u r e o f s m o k e , f o g a n d s u l p h u r d i o x i d e . C o m p o n e n t s o f p h o t o c h e m i c a l s m o g r e s u l t f r o m t h e a c t i o n o f s u n l i g h t o n u n s a t u r a t e d h y d r o c a r b o n s & o x i d e s o f n i t r o g e n p r o d u c e d b y a u t o m o b i l e s & f a c t o r i e s . 9 . G i v e n t h e e l e c t r o d e r e d u c t i o n p o t e n t i a l s o f f o u r m e t a l l i c e l e m e n t s A , B , C a n d D = + 0 . 7 9 , - 0 . 7 4 , 1 . 0 8 a n d – 0 . 3 1 V . A r r a n g e t h e s e i n o r d e r o f d e c r e a s i n g e l e c t r o p o s i t i v e c h a r a c t e r a n d s u p p o r t y o u a n s w e r . A n s . H i g h e r t h e e l e c t r o d e p o t e n t i a l l o w e r i s i t s t e n d e n c y t o l o s e e l e c t r o n s a n d t h e r e f o r e , l o w e r i s t h e e l e c t r o p o s i t i v e c h a r a c t e r o f t h e m e t a l . S o t h e m e t a l s a r e a r r a n g e d a s : B , D , A , C . 1 0 . G i v e a n y t h r e e f a c t o r s f a v o u r a b l e f o r t h e f o r m a t i o n o f i o n i c b o n d . A n s . ( a ) L o w i o n i z a t i o n e n t h a l p y o f t h e m e t a l a t o m . ( b ) H i g h e l e c t r o n g a i n e n t h a l p y o f t h e n o n - m e t a l a t o m . ( c ) H i g h l a t t i c e e n t h a l p y o f t h e c o m p o u n d f o r m e d . 1 1 . i . W h i c h o f t h e t w o i s m o r e s t a b l e o r a n d w h y ? i i . A l l b o n d s i n P C l 5 a r e n o t e q u a l . E x p l a i n . i i i . W h i c h o f t h e t w o i s m o r e i o n i c - N a C l o r N a I a n d w h y ? A n s . ( i ) i s m o r e s t a b l e t h a n a s i t c o n t a i n s n o e l e c t r o n i n a n t i b o n d i n g M O w h i l e l a t t e r c o n t a i n s a n e l e c t r o n i n a n t i b o n d i n g M O m a k i n g i t l e s s s t a b l e . ( i i ) P C l 5 c o n t a i n s a x i a l a n d e q u a t o r i a l b o n d s . A x i a l b o n d s a r e l o n g e r t h a n e q u a t o r i a l b o n d s a s t h e y f a c e m o r e r e p u l s i o n f r o m e q u a t o r i a l b o n d s . H e n c e a x i a l b o n d s a r e w e a k e r t h a n e q u a t o r i a l b o n d s . ( i i i ) N a I i s m o r e c o v a l e n t d u e t o h i g h p o l a r i z a b i l i t y o f i o d i d e t h a n c h l o r i d e i o n . 1 2 . E x p l a i n t h e f o l l o w i n g t e r m s w i t h a n e x a m p l e e a c h : i ) O p e n s y s t e m i i ) I s o l a t e d s y s t e m i i i ) C l o s e d s y s t e m A n s . ( i ) I n a n o p e n s y s t e m , t h e r e i s e x c h a n g e o f e n e r g y a n d m a t t e r b e t w e e n s y s t e m a n d s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a n o p e n b e a k e r i s a n e x a m p l e o f a n o p e n s y s t e m . H e r e t h e b o u n d a r y i s a n i m a g i n a r y s u r f a c e e n c l o s i n g t h e b e a k e r a n d r e a c t a n t s . ( i i ) I n a c l o s e d s y s t e m , t h e r e i s n o e x c h a n g e o f m a t t e r , b u t e x c h a n g e o f e n e r g y i s p o s s i b l e b e t w e e n s y s t e m a n d t h e s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a c l o s e d v e s s e l m a d e o f c o n d u c t i n g m a t e r i a l e . g . c o p p e r o r s t e e l i s a n e x a m p l e o f a c l o s e d s y s t e m . ( i i i ) I n a n i s o l a t e d s y s t e m , t h e r e i s n o e x c h a n g e o f e n e r g y o r m a t t e r b e t w e e n t h e s y s t e m a n d t h e s u r r o u n d i n g s . T h e p r e s e n c e o f r e a c t a n t s i n a t h e r m o s f l a s k o r a n y o t h e r c l o s e d i n s u l a t e d v e s s e l i s a n e x a m p l e o f a n i s o l a t e d s y s t e m . 1 3 . D r a w t h e s t r u c t u r e o f t h e f o l l o w i n g I U P A C c o m p o u n d s : a ) 2 , 8 - D i m e t h y l - 3 , 6 - d e c a d i e n e b ) 4 - E t h y l - 2 , 6 - d i m e t h y l - d e c - 4 - e n e c ) 1 , 3 , 5 , 7 O c t a t e t r a e n e d ) 4 - N i t r o s o - N - d i m e t h y l b e n z e n a m i n e e ) B e n z e n e 1 , 4 - d i c a r b o x y l i c a c i d f ) 1 - P h e n y l p r o p a n o n e A n s . 1 4 . i ) C a l c u l a t e t h e p e r c e n t a g e o f C a n d H i n 0 . 2 4 7 5 g o f a n o r g a n i c c o m p o u n d g a v e o n c o m b u s t i o n 0 . 4 9 5 0 g o f c a r b o n d i o x i d e a n d 0 . 2 0 2 5 g o f w a t e r . i i ) W h a t w i l l h a p p e n d u r i n g L a s s a i g n e ' s t e s t f o r n i t r o g e n i f t h e c o m p o u n d a l s o c o n t a i n s s u l p h u r ? A n s . ( i ) M a s s o f o r g a n i c c o m p o u n d = 0 . 2 4 7 5 g M a s s o f c a r b o n d i o x i d e p r o d u c e d = 0 . 4 9 5 0 gRead More
|
130 videos|235 docs|178 tests
|
FAQs on Past Year Paper with solution: Chemistry, 2017, Class 11 - Chemistry for Grade 11
| 1. What are the properties of acids and bases? |  |
Ans. Acids are substances that donate hydrogen ions (H+) in a solution, while bases are substances that accept hydrogen ions or donate hydroxide ions (OH-) in a solution. Some common properties of acids include sour taste, ability to react with metals to produce hydrogen gas, and ability to change the color of indicators. Bases, on the other hand, have a bitter taste, feel slippery, and can turn red litmus paper blue.
| 2. How can we calculate the molar mass of a compound? | |
Ans. To calculate the molar mass of a compound, we add up the atomic masses of all the atoms present in the compound. The atomic mass of an element can be found on the periodic table. We multiply the atomic mass of each element by the number of atoms of that element in the compound and then sum up these values to obtain the molar mass.
| 3. What is the difference between an exothermic and endothermic reaction? | |
Ans. An exothermic reaction is a reaction that releases heat energy to its surroundings, resulting in an increase in temperature. In contrast, an endothermic reaction is a reaction that absorbs heat energy from its surroundings, causing a decrease in temperature. Exothermic reactions often feel warm or hot, while endothermic reactions feel cold.
| 4. How can we determine the number of moles of a substance? | |
Ans. The number of moles of a substance can be determined by dividing its mass by its molar mass. The mass of a substance can be measured using a balance, while the molar mass can be calculated by summing up the atomic masses of all the atoms in the substance. The unit for the number of moles is mol.
| 5. What is the difference between a physical change and a chemical change? | |
Ans. A physical change is a change in the physical properties of a substance, such as its shape, size, or state, without the formation of a new substance. Examples of physical changes include melting, boiling, and dissolving. On the other hand, a chemical change involves the formation of new substances with different properties. It often involves the breaking and forming of chemical bonds. Examples of chemical changes include burning, rusting, and digestion.
Related Exams
About this Document
|
4.63/5 Rating |
|
Nov 21, 2024 Last updated |
Document Description: Past Year Paper with solution: Chemistry, 2017, Class 11 for Grade 11 2024 is part of Chemistry for Grade 11 preparation.
The notes and questions for Past Year Paper with solution: Chemistry, 2017, Class 11 have been prepared according to the Grade 11 exam syllabus. Information about Past Year Paper with solution: Chemistry, 2017, Class 11 covers topics
like and Past Year Paper with solution: Chemistry, 2017, Class 11 Example, for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Past Year Paper with solution: Chemistry, 2017, Class 11.
Introduction of Past Year Paper with solution: Chemistry, 2017, Class 11 in English is available as part of our Chemistry for Grade 11
for Grade 11 & Past Year Paper with solution: Chemistry, 2017, Class 11 in Hindi for Chemistry for Grade 11 course.
Download more important topics related with notes, lectures and mock test series for Grade 11
Exam by signing up for free. Grade 11: Past Year Paper with solution: Chemistry, 2017, Class 11 | Chemistry for Grade 11
Description
Full syllabus notes, lecture & questions for Past Year Paper with solution: Chemistry, 2017, Class 11 | Chemistry for Grade 11 - Grade 11 | Plus excerises question with solution to help you revise complete syllabus for Chemistry for Grade 11 | Best notes, free PDF download
Information about Past Year Paper with solution: Chemistry, 2017, Class 11
In this doc you can find the meaning of Past Year Paper with solution: Chemistry, 2017, Class 11 defined & explained in the simplest way possible. Besides explaining types of
Past Year Paper with solution: Chemistry, 2017, Class 11 theory, EduRev gives you an ample number of questions to practice Past Year Paper with solution: Chemistry, 2017, Class 11 tests, examples and also practice Grade 11
tests
|
Explore Courses for Grade 11 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Sample Paper
,Important questions
,mock tests for examination
,shortcuts and tricks
,Past Year Paper with solution: Chemistry
,Exam
,Class 11 | Chemistry for Grade 11
,Extra Questions
,Class 11 | Chemistry for Grade 11
,2017
,study material
,MCQs
,practice quizzes
,Past Year Paper with solution: Chemistry
,ppt
,Objective type Questions
,Viva Questions
,past year papers
,Summary
,Free
,2017
,Semester Notes
,video lectures
,Past Year Paper with solution: Chemistry
,2017
,Class 11 | Chemistry for Grade 11
,Previous Year Questions with Solutions
;
Additional Information about Past Year Paper with solution: Chemistry, 2017, Class 11 for Grade 11 Preparation
Past Year Paper with solution: Chemistry, 2017, Class 11 Free PDF Download
The Past Year Paper with solution: Chemistry, 2017, Class 11 is an invaluable resource that delves deep into the core of the Grade 11 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Past Year Paper with solution: Chemistry, 2017, Class 11 now and kickstart your journey towards success in the Grade 11 exam.
Importance of Past Year Paper with solution: Chemistry, 2017, Class 11
The importance of Past Year Paper with solution: Chemistry, 2017, Class 11 cannot be overstated, especially for Grade 11 aspirants.
This document holds the key to success in the Grade 11 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Past Year Paper with solution: Chemistry, 2017, Class 11 Notes
Past Year Paper with solution: Chemistry, 2017, Class 11 Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Past Year Paper with solution: Chemistry, 2017, Class 11.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Past Year Paper with solution: Chemistry, 2017, Class 11 Notes on EduRev are your ultimate resource for success.
Past Year Paper with solution: Chemistry, 2017, Class 11 Grade 11 Questions
The "Past Year Paper with solution: Chemistry, 2017, Class 11 Grade 11 Questions" guide is a valuable resource for all aspiring students preparing for the
Grade 11 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Past Year Paper with solution: Chemistry, 2017, Class 11 on the App
Students of Grade 11 can study Past Year Paper with solution: Chemistry, 2017, Class 11 alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Past Year Paper with solution: Chemistry, 2017, Class 11,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Past Year Paper with solution: Chemistry, 2017, Class 11 is prepared as per the latest Grade 11 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup