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Page 1 G e n e r a l I n s t r u c t i o n s : A l l q u e s t i o n s a r e c o m p u l s o r y . T h e p a p e r i s d i v i d e d i n t o t w o s e c t i o n s “ A ” a n d “ B ” . S e c t i o n A c o n t a i n s 3 q u e s t i o n s o f 1 m a r k e a c h , 3 q u e s t i o n s o f 2 m a r k s e a c h , 1 2 q u e s t i o n s o f 3 m a r k s e a c h a n d 6 q u e s t i o n s o f 5 m a r k s e a c h . S e c t i o n B c o n t a i n s 1 5 m u l t i p l e c h o i c e q u e s t i o n s o f 1 m a r k e a c h . W h e r e v e r n e c e s s a r y , t h e d i a g r a m d r a w n s h o u l d b e n e a t a n d p r o p e r l y l a b e l l e d . S e c t i o n A 1 . N a m e t h e m i c r o - o r g a n i s m r e s p o n s i b l e f o r c a u s i n g a f a t a l b l o o d d i s e a s e i n h u m a n b e i n g s w h i l e w o r k i n g i n a w o o l i n d u s t r y . 2 . M e n t i o n t h e t y p e o f t r e a t m e n t g i v e n t o t h e f a c t o r y w a s t e b e f o r e r e l e a s i n g i t i n w a t e r b o d i e s . 3 . W r i t e a n y o n e m e t h o d t o f i n d o u t w i n d d i r e c t i o n a t a g i v e n p l a c e . 4 . W h y d o e s a t u r m e r i c s t a i n o n a w h i t e s h i r t t u r n r e d w h e n w a s h e d w i t h s o a p ? 5 . L i s t a n y f o u r p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 6 . D e f i n e s e l e c t i v e b r e e d i n g a n d m e n t i o n a n y o n e c h a r a c t e r f o r w h i c h s e l e c t i v e b r e e d i n g i s d o n e . 7 . H o w d o t h e f o l l o w i n g h e l p i n r e p l e n i s h i n g t h e s o i l ? a ) R h i z o b i u m b ) D e c o m p o s e r s c ) F a r m e r s 8 . Y o u h a v e s e e n c a t t l e c o n t i n u o u s l y c h e w i n g t h e i r f o o d . E x p l a i n t h e p r o c e s s g o i n g o n . 9 . L i s t t h e d i f f e r e n t s t e p s o f p r o c e s s i n g f i b e r s i n t o w o o l . 1 0 . D r a w t h e t w o s t a g e s i n t h e l i f e c y c l e o f s i l k m o t h w h i c h a r e d i r e c t l y i n v o l v e d i n t h e p r o d u c t i o n o f s i l k . 1 1 . G i v e r e a s o n w h y ? a ) L a n d b r e e z e b l o w s d u r i n g n i g h t . Page 2 G e n e r a l I n s t r u c t i o n s : A l l q u e s t i o n s a r e c o m p u l s o r y . T h e p a p e r i s d i v i d e d i n t o t w o s e c t i o n s “ A ” a n d “ B ” . S e c t i o n A c o n t a i n s 3 q u e s t i o n s o f 1 m a r k e a c h , 3 q u e s t i o n s o f 2 m a r k s e a c h , 1 2 q u e s t i o n s o f 3 m a r k s e a c h a n d 6 q u e s t i o n s o f 5 m a r k s e a c h . S e c t i o n B c o n t a i n s 1 5 m u l t i p l e c h o i c e q u e s t i o n s o f 1 m a r k e a c h . W h e r e v e r n e c e s s a r y , t h e d i a g r a m d r a w n s h o u l d b e n e a t a n d p r o p e r l y l a b e l l e d . S e c t i o n A 1 . N a m e t h e m i c r o - o r g a n i s m r e s p o n s i b l e f o r c a u s i n g a f a t a l b l o o d d i s e a s e i n h u m a n b e i n g s w h i l e w o r k i n g i n a w o o l i n d u s t r y . 2 . M e n t i o n t h e t y p e o f t r e a t m e n t g i v e n t o t h e f a c t o r y w a s t e b e f o r e r e l e a s i n g i t i n w a t e r b o d i e s . 3 . W r i t e a n y o n e m e t h o d t o f i n d o u t w i n d d i r e c t i o n a t a g i v e n p l a c e . 4 . W h y d o e s a t u r m e r i c s t a i n o n a w h i t e s h i r t t u r n r e d w h e n w a s h e d w i t h s o a p ? 5 . L i s t a n y f o u r p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 6 . D e f i n e s e l e c t i v e b r e e d i n g a n d m e n t i o n a n y o n e c h a r a c t e r f o r w h i c h s e l e c t i v e b r e e d i n g i s d o n e . 7 . H o w d o t h e f o l l o w i n g h e l p i n r e p l e n i s h i n g t h e s o i l ? a ) R h i z o b i u m b ) D e c o m p o s e r s c ) F a r m e r s 8 . Y o u h a v e s e e n c a t t l e c o n t i n u o u s l y c h e w i n g t h e i r f o o d . E x p l a i n t h e p r o c e s s g o i n g o n . 9 . L i s t t h e d i f f e r e n t s t e p s o f p r o c e s s i n g f i b e r s i n t o w o o l . 1 0 . D r a w t h e t w o s t a g e s i n t h e l i f e c y c l e o f s i l k m o t h w h i c h a r e d i r e c t l y i n v o l v e d i n t h e p r o d u c t i o n o f s i l k . 1 1 . G i v e r e a s o n w h y ? a ) L a n d b r e e z e b l o w s d u r i n g n i g h t . b ) B l a c k a n d d a r k c o l o r c l o t h e s a r e p r e f e r r e d i n w i n t e r . c ) H a n d l e s o f c o o k i n g u t e n s i l s a r e m a d e o f w o o d o r B a k e l i t e . 1 2 . W r i t e s i x p o i n t s o f d i f f e r e n c e s b e t w e e n a c i d s a n d b a s e s . 1 3 . M e n t i o n t h e e f f e c t o f f o l l o w i n g s o l u t i o n s o n b l u e - l i t m u s p a p e r : - a ) L i m e w a t e r b ) S a l t s o l u t i o n c ) V i n e g a r d ) M i l k e ) S e a w a t e r f ) C u r d 1 4 . C l a s s i f y t h e c h a n g e s i n v o l v e d i n t h e f o l l o w i n g p r o c e s s e s a s p h y s i c a l o r c h e m i c a l c h a n g e s : - a ) D i s s o l v i n g s u g a r i n w a t e r b ) D i g e s t i o n o f p r o t e i n s i n s t o m a c h c ) F o r m a t i o n o f s t e a m d ) M e l t i n g o f w a x e ) F o r m a t i o n o f m a n u r e f ) C h e w i n g o f f o o d 1 5 . W r i t e a n y t h r e e a d a p t i v e f e a t u r e s o f p o l a r b e a r . 1 6 . D e m o n s t r a t e a n y a c t i v i t y t o s h o w t h a t a i r e x p a n d s o n h e a t i n g . 1 7 . M e n t i o n a n y t h r e e p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 1 8 . a ) S o i l A t o o k 3 0 m i n f o r 1 0 0 m l o f w a t e r a n d S o i l B t o o k 2 0 m i n f o r 5 0 m l o f w a t e r o f p e r c o l a t e t h r o u g h i t . C a l c u l a t e t h e r a t e o f p e r c o l a t i o n o f w a t e r i n S o i l A a n d B . b ) W h i c h s o i l s a m p l e w i l l y o u p r e f e r f o r g r o w i n g p a d d y ? G i v e r e a s o n . 1 9 . D r a w a n e a t d i a g r a m o f h u m a n d i g e s t i v e s y s t e m a n d l a b e l t h e p a r t s w h e r e : - a ) F a t s a r e d i g e s t e d b ) B i l e j u i c e i s p r o d u c e s c ) A c i d i s r e l e a s e d d ) P e r i s t a l t i c m o v e m e n t s o c c u r 2 0 . a ) D i f f e r e n t i a t e b e t w e e n c l i n i c a l a n d l a b o r a t o r y t h e r m o m e t e r . b ) W h i c h a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . Page 3 G e n e r a l I n s t r u c t i o n s : A l l q u e s t i o n s a r e c o m p u l s o r y . T h e p a p e r i s d i v i d e d i n t o t w o s e c t i o n s “ A ” a n d “ B ” . S e c t i o n A c o n t a i n s 3 q u e s t i o n s o f 1 m a r k e a c h , 3 q u e s t i o n s o f 2 m a r k s e a c h , 1 2 q u e s t i o n s o f 3 m a r k s e a c h a n d 6 q u e s t i o n s o f 5 m a r k s e a c h . S e c t i o n B c o n t a i n s 1 5 m u l t i p l e c h o i c e q u e s t i o n s o f 1 m a r k e a c h . W h e r e v e r n e c e s s a r y , t h e d i a g r a m d r a w n s h o u l d b e n e a t a n d p r o p e r l y l a b e l l e d . S e c t i o n A 1 . N a m e t h e m i c r o - o r g a n i s m r e s p o n s i b l e f o r c a u s i n g a f a t a l b l o o d d i s e a s e i n h u m a n b e i n g s w h i l e w o r k i n g i n a w o o l i n d u s t r y . 2 . M e n t i o n t h e t y p e o f t r e a t m e n t g i v e n t o t h e f a c t o r y w a s t e b e f o r e r e l e a s i n g i t i n w a t e r b o d i e s . 3 . W r i t e a n y o n e m e t h o d t o f i n d o u t w i n d d i r e c t i o n a t a g i v e n p l a c e . 4 . W h y d o e s a t u r m e r i c s t a i n o n a w h i t e s h i r t t u r n r e d w h e n w a s h e d w i t h s o a p ? 5 . L i s t a n y f o u r p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 6 . D e f i n e s e l e c t i v e b r e e d i n g a n d m e n t i o n a n y o n e c h a r a c t e r f o r w h i c h s e l e c t i v e b r e e d i n g i s d o n e . 7 . H o w d o t h e f o l l o w i n g h e l p i n r e p l e n i s h i n g t h e s o i l ? a ) R h i z o b i u m b ) D e c o m p o s e r s c ) F a r m e r s 8 . Y o u h a v e s e e n c a t t l e c o n t i n u o u s l y c h e w i n g t h e i r f o o d . E x p l a i n t h e p r o c e s s g o i n g o n . 9 . L i s t t h e d i f f e r e n t s t e p s o f p r o c e s s i n g f i b e r s i n t o w o o l . 1 0 . D r a w t h e t w o s t a g e s i n t h e l i f e c y c l e o f s i l k m o t h w h i c h a r e d i r e c t l y i n v o l v e d i n t h e p r o d u c t i o n o f s i l k . 1 1 . G i v e r e a s o n w h y ? a ) L a n d b r e e z e b l o w s d u r i n g n i g h t . b ) B l a c k a n d d a r k c o l o r c l o t h e s a r e p r e f e r r e d i n w i n t e r . c ) H a n d l e s o f c o o k i n g u t e n s i l s a r e m a d e o f w o o d o r B a k e l i t e . 1 2 . W r i t e s i x p o i n t s o f d i f f e r e n c e s b e t w e e n a c i d s a n d b a s e s . 1 3 . M e n t i o n t h e e f f e c t o f f o l l o w i n g s o l u t i o n s o n b l u e - l i t m u s p a p e r : - a ) L i m e w a t e r b ) S a l t s o l u t i o n c ) V i n e g a r d ) M i l k e ) S e a w a t e r f ) C u r d 1 4 . C l a s s i f y t h e c h a n g e s i n v o l v e d i n t h e f o l l o w i n g p r o c e s s e s a s p h y s i c a l o r c h e m i c a l c h a n g e s : - a ) D i s s o l v i n g s u g a r i n w a t e r b ) D i g e s t i o n o f p r o t e i n s i n s t o m a c h c ) F o r m a t i o n o f s t e a m d ) M e l t i n g o f w a x e ) F o r m a t i o n o f m a n u r e f ) C h e w i n g o f f o o d 1 5 . W r i t e a n y t h r e e a d a p t i v e f e a t u r e s o f p o l a r b e a r . 1 6 . D e m o n s t r a t e a n y a c t i v i t y t o s h o w t h a t a i r e x p a n d s o n h e a t i n g . 1 7 . M e n t i o n a n y t h r e e p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 1 8 . a ) S o i l A t o o k 3 0 m i n f o r 1 0 0 m l o f w a t e r a n d S o i l B t o o k 2 0 m i n f o r 5 0 m l o f w a t e r o f p e r c o l a t e t h r o u g h i t . C a l c u l a t e t h e r a t e o f p e r c o l a t i o n o f w a t e r i n S o i l A a n d B . b ) W h i c h s o i l s a m p l e w i l l y o u p r e f e r f o r g r o w i n g p a d d y ? G i v e r e a s o n . 1 9 . D r a w a n e a t d i a g r a m o f h u m a n d i g e s t i v e s y s t e m a n d l a b e l t h e p a r t s w h e r e : - a ) F a t s a r e d i g e s t e d b ) B i l e j u i c e i s p r o d u c e s c ) A c i d i s r e l e a s e d d ) P e r i s t a l t i c m o v e m e n t s o c c u r 2 0 . a ) D i f f e r e n t i a t e b e t w e e n c l i n i c a l a n d l a b o r a t o r y t h e r m o m e t e r . b ) W h i c h a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 1 . a ) W h e n i s r u s t i n g o f i r o n w i l l b e f a s t e r i n D e l h i . G i v e r e a s o n s t o s u p p o r t y o u r a n s w e r . b ) W r i t e a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 2 . a ) W r i t e t h e w o r d e q u a t i o n o f t h e p r o c e s s b y w h i c h s t a r c h o r c a r b o h y d r a t e s a r e p r o d u c e d i n p l a n t s . b ) N a m e a n d e x p l a i n t h e t e s t u s e d t o d e t e c t t h e o c c u r r e n c e o f p h o t o s y n t h e s i s i n l e a v e s . 2 3 . O b s e r v e t h e d i a g r a m g i v e n b e l o w a n d a n s w e r t h e f o l l o w i n g q u e s t i o n s : - a ) I d e n t i f y t h e l a y e r s s h o w n i n t h e d i a g r a m . b ) W r i t e t h e c h a r a c t e r i s t i c s f e a t u r e s o f f i r s t t h r e e l a y e r s . 2 4 . a ) M e n t i o n t h e u n i t o f m e a s u r e m e n t o f a n y f o u r f a c t o r s t h a t d e s c r i b e s w e a t h e r o f a p l a c e . b ) W h i c h o f t h e f o l l o w i n g w e a t h e r o f c l i m a t e c h a n g e s f r e q u e n t l y ? E x p l a i n . S e c t i o n B 2 5 . T h e f o o d s u b s t a n c e s d i g e s t e d i n t h e b u c c a l c a v i t y i s : - a ) S t a r c h b ) C e l l u l o s e c ) P r o t e i n s d ) F a t s 2 6 . A m o e b a c a p t u r e s i t s f o o d w i t h t h e h e l p o f : - a ) F o o d v a c u o l e b ) P s e u d o p o d i a c ) C i l i a d ) V i l l i 2 7 . W o o l i s _ _ _ _ _ _ _ f i b r e , w h e r e a s n y l o n i s _ _ _ _ _ _ _ f i b r e . a ) S y n t h e t i c , a n i m a l b ) A n i m a l , s y n t h e t i c c ) A n i m a l , p l a n t d ) S y n t h e t i c , p l a n t Page 4 G e n e r a l I n s t r u c t i o n s : A l l q u e s t i o n s a r e c o m p u l s o r y . T h e p a p e r i s d i v i d e d i n t o t w o s e c t i o n s “ A ” a n d “ B ” . S e c t i o n A c o n t a i n s 3 q u e s t i o n s o f 1 m a r k e a c h , 3 q u e s t i o n s o f 2 m a r k s e a c h , 1 2 q u e s t i o n s o f 3 m a r k s e a c h a n d 6 q u e s t i o n s o f 5 m a r k s e a c h . S e c t i o n B c o n t a i n s 1 5 m u l t i p l e c h o i c e q u e s t i o n s o f 1 m a r k e a c h . W h e r e v e r n e c e s s a r y , t h e d i a g r a m d r a w n s h o u l d b e n e a t a n d p r o p e r l y l a b e l l e d . S e c t i o n A 1 . N a m e t h e m i c r o - o r g a n i s m r e s p o n s i b l e f o r c a u s i n g a f a t a l b l o o d d i s e a s e i n h u m a n b e i n g s w h i l e w o r k i n g i n a w o o l i n d u s t r y . 2 . M e n t i o n t h e t y p e o f t r e a t m e n t g i v e n t o t h e f a c t o r y w a s t e b e f o r e r e l e a s i n g i t i n w a t e r b o d i e s . 3 . W r i t e a n y o n e m e t h o d t o f i n d o u t w i n d d i r e c t i o n a t a g i v e n p l a c e . 4 . W h y d o e s a t u r m e r i c s t a i n o n a w h i t e s h i r t t u r n r e d w h e n w a s h e d w i t h s o a p ? 5 . L i s t a n y f o u r p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 6 . D e f i n e s e l e c t i v e b r e e d i n g a n d m e n t i o n a n y o n e c h a r a c t e r f o r w h i c h s e l e c t i v e b r e e d i n g i s d o n e . 7 . H o w d o t h e f o l l o w i n g h e l p i n r e p l e n i s h i n g t h e s o i l ? a ) R h i z o b i u m b ) D e c o m p o s e r s c ) F a r m e r s 8 . Y o u h a v e s e e n c a t t l e c o n t i n u o u s l y c h e w i n g t h e i r f o o d . E x p l a i n t h e p r o c e s s g o i n g o n . 9 . L i s t t h e d i f f e r e n t s t e p s o f p r o c e s s i n g f i b e r s i n t o w o o l . 1 0 . D r a w t h e t w o s t a g e s i n t h e l i f e c y c l e o f s i l k m o t h w h i c h a r e d i r e c t l y i n v o l v e d i n t h e p r o d u c t i o n o f s i l k . 1 1 . G i v e r e a s o n w h y ? a ) L a n d b r e e z e b l o w s d u r i n g n i g h t . b ) B l a c k a n d d a r k c o l o r c l o t h e s a r e p r e f e r r e d i n w i n t e r . c ) H a n d l e s o f c o o k i n g u t e n s i l s a r e m a d e o f w o o d o r B a k e l i t e . 1 2 . W r i t e s i x p o i n t s o f d i f f e r e n c e s b e t w e e n a c i d s a n d b a s e s . 1 3 . M e n t i o n t h e e f f e c t o f f o l l o w i n g s o l u t i o n s o n b l u e - l i t m u s p a p e r : - a ) L i m e w a t e r b ) S a l t s o l u t i o n c ) V i n e g a r d ) M i l k e ) S e a w a t e r f ) C u r d 1 4 . C l a s s i f y t h e c h a n g e s i n v o l v e d i n t h e f o l l o w i n g p r o c e s s e s a s p h y s i c a l o r c h e m i c a l c h a n g e s : - a ) D i s s o l v i n g s u g a r i n w a t e r b ) D i g e s t i o n o f p r o t e i n s i n s t o m a c h c ) F o r m a t i o n o f s t e a m d ) M e l t i n g o f w a x e ) F o r m a t i o n o f m a n u r e f ) C h e w i n g o f f o o d 1 5 . W r i t e a n y t h r e e a d a p t i v e f e a t u r e s o f p o l a r b e a r . 1 6 . D e m o n s t r a t e a n y a c t i v i t y t o s h o w t h a t a i r e x p a n d s o n h e a t i n g . 1 7 . M e n t i o n a n y t h r e e p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 1 8 . a ) S o i l A t o o k 3 0 m i n f o r 1 0 0 m l o f w a t e r a n d S o i l B t o o k 2 0 m i n f o r 5 0 m l o f w a t e r o f p e r c o l a t e t h r o u g h i t . C a l c u l a t e t h e r a t e o f p e r c o l a t i o n o f w a t e r i n S o i l A a n d B . b ) W h i c h s o i l s a m p l e w i l l y o u p r e f e r f o r g r o w i n g p a d d y ? G i v e r e a s o n . 1 9 . D r a w a n e a t d i a g r a m o f h u m a n d i g e s t i v e s y s t e m a n d l a b e l t h e p a r t s w h e r e : - a ) F a t s a r e d i g e s t e d b ) B i l e j u i c e i s p r o d u c e s c ) A c i d i s r e l e a s e d d ) P e r i s t a l t i c m o v e m e n t s o c c u r 2 0 . a ) D i f f e r e n t i a t e b e t w e e n c l i n i c a l a n d l a b o r a t o r y t h e r m o m e t e r . b ) W h i c h a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 1 . a ) W h e n i s r u s t i n g o f i r o n w i l l b e f a s t e r i n D e l h i . G i v e r e a s o n s t o s u p p o r t y o u r a n s w e r . b ) W r i t e a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 2 . a ) W r i t e t h e w o r d e q u a t i o n o f t h e p r o c e s s b y w h i c h s t a r c h o r c a r b o h y d r a t e s a r e p r o d u c e d i n p l a n t s . b ) N a m e a n d e x p l a i n t h e t e s t u s e d t o d e t e c t t h e o c c u r r e n c e o f p h o t o s y n t h e s i s i n l e a v e s . 2 3 . O b s e r v e t h e d i a g r a m g i v e n b e l o w a n d a n s w e r t h e f o l l o w i n g q u e s t i o n s : - a ) I d e n t i f y t h e l a y e r s s h o w n i n t h e d i a g r a m . b ) W r i t e t h e c h a r a c t e r i s t i c s f e a t u r e s o f f i r s t t h r e e l a y e r s . 2 4 . a ) M e n t i o n t h e u n i t o f m e a s u r e m e n t o f a n y f o u r f a c t o r s t h a t d e s c r i b e s w e a t h e r o f a p l a c e . b ) W h i c h o f t h e f o l l o w i n g w e a t h e r o f c l i m a t e c h a n g e s f r e q u e n t l y ? E x p l a i n . S e c t i o n B 2 5 . T h e f o o d s u b s t a n c e s d i g e s t e d i n t h e b u c c a l c a v i t y i s : - a ) S t a r c h b ) C e l l u l o s e c ) P r o t e i n s d ) F a t s 2 6 . A m o e b a c a p t u r e s i t s f o o d w i t h t h e h e l p o f : - a ) F o o d v a c u o l e b ) P s e u d o p o d i a c ) C i l i a d ) V i l l i 2 7 . W o o l i s _ _ _ _ _ _ _ f i b r e , w h e r e a s n y l o n i s _ _ _ _ _ _ _ f i b r e . a ) S y n t h e t i c , a n i m a l b ) A n i m a l , s y n t h e t i c c ) A n i m a l , p l a n t d ) S y n t h e t i c , p l a n t 2 8 . T h e u l t i m a t e s o u r c e o f e n e r g y f o r a l l l i v i n g o r g a n i s m i s : - a ) S u n b ) W a t e r c ) S o i l d ) M i n e r a l s 2 9 . A p l a n t w i t h o n l y h e t e r o t r o p h i c m o d e o f n u t r i t i o n i s : - a ) A m a r b e l b ) P i t c h e r p l a n t c ) F u n g i d ) A l g a e 3 0 . H a n d l e o f c o o k i n g v e s s e l s i s m a d e u p o f : - a ) A l u m i n i u m b ) B a k e l i t e c ) C o p p e r d ) S t e e l 3 1 . A n i r o n b a l l a t 3 0 C ° i s d r o p p e d i n a m u g c o n t a i n i n g w a t e r a t 5 0 C ° . T h e h e a t w i l l : - a ) N o t f l o w b ) F l o w f r o m b a l l t o w a t e r c ) F l o w f r o m w a t e r t o b a l l d ) F l o w f r o m b o t h b a l l t o w a t e r a n d w a t e r t o b a l l 3 2 . T h e c o l o r o f m e t h y l o r a n g e i s a c i d i s : - a ) P i n k b ) R e d c ) P u r p l e d ) Y e l l o w 3 3 . M o s t c h e m i c a l c h a n g e s a r e _ _ _ _ _ _ _ _ _ _ w h e r e a s m o s t p h y s i c a l c h a n g e s a r e _ _ _ _ _ _ _ _ _ _ a ) R e v e r s i b l e , i r r e v e r s i b l e b ) I r r e v e r s i b l e , i r r e v e r s i b l e c ) R e v e r s i b l e , r e v e r s i b l e d ) I r r e v e r s i b l e , r e v e r s i b l e Page 5 G e n e r a l I n s t r u c t i o n s : A l l q u e s t i o n s a r e c o m p u l s o r y . T h e p a p e r i s d i v i d e d i n t o t w o s e c t i o n s “ A ” a n d “ B ” . S e c t i o n A c o n t a i n s 3 q u e s t i o n s o f 1 m a r k e a c h , 3 q u e s t i o n s o f 2 m a r k s e a c h , 1 2 q u e s t i o n s o f 3 m a r k s e a c h a n d 6 q u e s t i o n s o f 5 m a r k s e a c h . S e c t i o n B c o n t a i n s 1 5 m u l t i p l e c h o i c e q u e s t i o n s o f 1 m a r k e a c h . W h e r e v e r n e c e s s a r y , t h e d i a g r a m d r a w n s h o u l d b e n e a t a n d p r o p e r l y l a b e l l e d . S e c t i o n A 1 . N a m e t h e m i c r o - o r g a n i s m r e s p o n s i b l e f o r c a u s i n g a f a t a l b l o o d d i s e a s e i n h u m a n b e i n g s w h i l e w o r k i n g i n a w o o l i n d u s t r y . 2 . M e n t i o n t h e t y p e o f t r e a t m e n t g i v e n t o t h e f a c t o r y w a s t e b e f o r e r e l e a s i n g i t i n w a t e r b o d i e s . 3 . W r i t e a n y o n e m e t h o d t o f i n d o u t w i n d d i r e c t i o n a t a g i v e n p l a c e . 4 . W h y d o e s a t u r m e r i c s t a i n o n a w h i t e s h i r t t u r n r e d w h e n w a s h e d w i t h s o a p ? 5 . L i s t a n y f o u r p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 6 . D e f i n e s e l e c t i v e b r e e d i n g a n d m e n t i o n a n y o n e c h a r a c t e r f o r w h i c h s e l e c t i v e b r e e d i n g i s d o n e . 7 . H o w d o t h e f o l l o w i n g h e l p i n r e p l e n i s h i n g t h e s o i l ? a ) R h i z o b i u m b ) D e c o m p o s e r s c ) F a r m e r s 8 . Y o u h a v e s e e n c a t t l e c o n t i n u o u s l y c h e w i n g t h e i r f o o d . E x p l a i n t h e p r o c e s s g o i n g o n . 9 . L i s t t h e d i f f e r e n t s t e p s o f p r o c e s s i n g f i b e r s i n t o w o o l . 1 0 . D r a w t h e t w o s t a g e s i n t h e l i f e c y c l e o f s i l k m o t h w h i c h a r e d i r e c t l y i n v o l v e d i n t h e p r o d u c t i o n o f s i l k . 1 1 . G i v e r e a s o n w h y ? a ) L a n d b r e e z e b l o w s d u r i n g n i g h t . b ) B l a c k a n d d a r k c o l o r c l o t h e s a r e p r e f e r r e d i n w i n t e r . c ) H a n d l e s o f c o o k i n g u t e n s i l s a r e m a d e o f w o o d o r B a k e l i t e . 1 2 . W r i t e s i x p o i n t s o f d i f f e r e n c e s b e t w e e n a c i d s a n d b a s e s . 1 3 . M e n t i o n t h e e f f e c t o f f o l l o w i n g s o l u t i o n s o n b l u e - l i t m u s p a p e r : - a ) L i m e w a t e r b ) S a l t s o l u t i o n c ) V i n e g a r d ) M i l k e ) S e a w a t e r f ) C u r d 1 4 . C l a s s i f y t h e c h a n g e s i n v o l v e d i n t h e f o l l o w i n g p r o c e s s e s a s p h y s i c a l o r c h e m i c a l c h a n g e s : - a ) D i s s o l v i n g s u g a r i n w a t e r b ) D i g e s t i o n o f p r o t e i n s i n s t o m a c h c ) F o r m a t i o n o f s t e a m d ) M e l t i n g o f w a x e ) F o r m a t i o n o f m a n u r e f ) C h e w i n g o f f o o d 1 5 . W r i t e a n y t h r e e a d a p t i v e f e a t u r e s o f p o l a r b e a r . 1 6 . D e m o n s t r a t e a n y a c t i v i t y t o s h o w t h a t a i r e x p a n d s o n h e a t i n g . 1 7 . M e n t i o n a n y t h r e e p r e c a u t i o n s t o b e t a k e n i n a c y c l o n e h i t a r e a . 1 8 . a ) S o i l A t o o k 3 0 m i n f o r 1 0 0 m l o f w a t e r a n d S o i l B t o o k 2 0 m i n f o r 5 0 m l o f w a t e r o f p e r c o l a t e t h r o u g h i t . C a l c u l a t e t h e r a t e o f p e r c o l a t i o n o f w a t e r i n S o i l A a n d B . b ) W h i c h s o i l s a m p l e w i l l y o u p r e f e r f o r g r o w i n g p a d d y ? G i v e r e a s o n . 1 9 . D r a w a n e a t d i a g r a m o f h u m a n d i g e s t i v e s y s t e m a n d l a b e l t h e p a r t s w h e r e : - a ) F a t s a r e d i g e s t e d b ) B i l e j u i c e i s p r o d u c e s c ) A c i d i s r e l e a s e d d ) P e r i s t a l t i c m o v e m e n t s o c c u r 2 0 . a ) D i f f e r e n t i a t e b e t w e e n c l i n i c a l a n d l a b o r a t o r y t h e r m o m e t e r . b ) W h i c h a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 1 . a ) W h e n i s r u s t i n g o f i r o n w i l l b e f a s t e r i n D e l h i . G i v e r e a s o n s t o s u p p o r t y o u r a n s w e r . b ) W r i t e a n y f o u r w a y s o f p r e v e n t i n g r u s t i n g o f i r o n . c ) W r i t e a c h e m i c a l r e a c t i o n o f r u s t i n g . 2 2 . a ) W r i t e t h e w o r d e q u a t i o n o f t h e p r o c e s s b y w h i c h s t a r c h o r c a r b o h y d r a t e s a r e p r o d u c e d i n p l a n t s . b ) N a m e a n d e x p l a i n t h e t e s t u s e d t o d e t e c t t h e o c c u r r e n c e o f p h o t o s y n t h e s i s i n l e a v e s . 2 3 . O b s e r v e t h e d i a g r a m g i v e n b e l o w a n d a n s w e r t h e f o l l o w i n g q u e s t i o n s : - a ) I d e n t i f y t h e l a y e r s s h o w n i n t h e d i a g r a m . b ) W r i t e t h e c h a r a c t e r i s t i c s f e a t u r e s o f f i r s t t h r e e l a y e r s . 2 4 . a ) M e n t i o n t h e u n i t o f m e a s u r e m e n t o f a n y f o u r f a c t o r s t h a t d e s c r i b e s w e a t h e r o f a p l a c e . b ) W h i c h o f t h e f o l l o w i n g w e a t h e r o f c l i m a t e c h a n g e s f r e q u e n t l y ? E x p l a i n . S e c t i o n B 2 5 . T h e f o o d s u b s t a n c e s d i g e s t e d i n t h e b u c c a l c a v i t y i s : - a ) S t a r c h b ) C e l l u l o s e c ) P r o t e i n s d ) F a t s 2 6 . A m o e b a c a p t u r e s i t s f o o d w i t h t h e h e l p o f : - a ) F o o d v a c u o l e b ) P s e u d o p o d i a c ) C i l i a d ) V i l l i 2 7 . W o o l i s _ _ _ _ _ _ _ f i b r e , w h e r e a s n y l o n i s _ _ _ _ _ _ _ f i b r e . a ) S y n t h e t i c , a n i m a l b ) A n i m a l , s y n t h e t i c c ) A n i m a l , p l a n t d ) S y n t h e t i c , p l a n t 2 8 . T h e u l t i m a t e s o u r c e o f e n e r g y f o r a l l l i v i n g o r g a n i s m i s : - a ) S u n b ) W a t e r c ) S o i l d ) M i n e r a l s 2 9 . A p l a n t w i t h o n l y h e t e r o t r o p h i c m o d e o f n u t r i t i o n i s : - a ) A m a r b e l b ) P i t c h e r p l a n t c ) F u n g i d ) A l g a e 3 0 . H a n d l e o f c o o k i n g v e s s e l s i s m a d e u p o f : - a ) A l u m i n i u m b ) B a k e l i t e c ) C o p p e r d ) S t e e l 3 1 . A n i r o n b a l l a t 3 0 C ° i s d r o p p e d i n a m u g c o n t a i n i n g w a t e r a t 5 0 C ° . T h e h e a t w i l l : - a ) N o t f l o w b ) F l o w f r o m b a l l t o w a t e r c ) F l o w f r o m w a t e r t o b a l l d ) F l o w f r o m b o t h b a l l t o w a t e r a n d w a t e r t o b a l l 3 2 . T h e c o l o r o f m e t h y l o r a n g e i s a c i d i s : - a ) P i n k b ) R e d c ) P u r p l e d ) Y e l l o w 3 3 . M o s t c h e m i c a l c h a n g e s a r e _ _ _ _ _ _ _ _ _ _ w h e r e a s m o s t p h y s i c a l c h a n g e s a r e _ _ _ _ _ _ _ _ _ _ a ) R e v e r s i b l e , i r r e v e r s i b l e b ) I r r e v e r s i b l e , i r r e v e r s i b l e c ) R e v e r s i b l e , r e v e r s i b l e d ) I r r e v e r s i b l e , r e v e r s i b l e 3 4 . T h e s u b s t a n c e f o r m e d w h e n m a g n e s i u m o x i d e i s d i s s o l v e d i n w a t e r i s : - a ) M g ( O H ) 2 b ) M g O c ) M g O H d ) M g 3 5 . T h e m i n i m u m t e m p e r a t u r e o f t h e d a y i n w i n t e r s i s t a k i n g d u r i n g : - a ) A f t e r n o o n b ) E a r l y m o r n i n g c ) N i g h t d ) E v e n i n g 3 6 . W h i c h o f t h e f o l l o w i n g a n i m a l i s n o t a d a p t e d t o h o t a n d h u m i d c l i m a t e ? a ) R e i n d e e r b ) R e d e y e d f r o g c ) T o u c a n b i r d d ) B e a r d a p e 3 7 . W h i c h o f t h e f o l l o w i n g p l a y s a m a j o r r o l e i n t h e f o r m a t i o n o f t h e t h u n d e r s t o r m ? a ) C o n d u c t i o n b ) C o n v e c t i o n c ) R a d i a t i o n d ) N o n e o f t h e s e 3 8 . T h e t y p e o f s o i l u s e d t o g r o w p a d d y i s : - a ) C l a y e y b ) L o a m y c ) S a n d y d ) S i l k 3 9 . T h e w e l l a e r a t e d s o i l i s : - a ) C l a y e y b ) L o a m y c ) S a n d y d ) s i l kRead More
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FAQs on Class 7 Science: CBSE Past Year Paper - 11 - Science Class 7
| 1. What are the major organs of the respiratory system in humans? |  |
Ans. The major organs of the respiratory system in humans are the nose, pharynx, larynx, trachea, bronchi, and lungs.
| 2. How does the respiratory system help in the exchange of gases? | |
Ans. The respiratory system helps in the exchange of gases by inhaling oxygen-rich air through the nose or mouth. The oxygen then passes through the pharynx, larynx, trachea, and bronchi into the lungs. In the lungs, oxygen is transferred to the bloodstream, while carbon dioxide, a waste gas, is removed from the bloodstream and exhaled.
| 3. What is the purpose of the cilia in the respiratory system? | |
Ans. The purpose of the cilia in the respiratory system is to trap and remove dust, debris, and other foreign particles from the air we breathe. The cilia are tiny hair-like structures that line the respiratory tract and move in coordinated motions to sweep out these particles, preventing them from entering the lungs.
| 4. How does smoking affect the respiratory system? | |
Ans. Smoking can severely damage the respiratory system. The harmful chemicals in tobacco smoke can irritate and inflame the airways, leading to conditions such as chronic bronchitis and emphysema. Smoking also increases the risk of developing lung cancer. Additionally, it impairs the cilia's function, making it difficult for the respiratory system to effectively remove toxins and debris from the airways.
| 5. What is the role of the diaphragm in the respiratory system? | |
Ans. The diaphragm plays a crucial role in the respiratory system as it helps in the process of breathing. It is a dome-shaped muscle located at the bottom of the ribcage. When we inhale, the diaphragm contracts and moves downward, increasing the space in the chest cavity. This allows the lungs to expand and fill with air. When we exhale, the diaphragm relaxes and moves upward, pushing the air out of the lungs.
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Dec 23, 2024 Last updated |
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Additional Information about Class 7 Science: CBSE Past Year Paper - 11 for Class 7 Preparation
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