Flashcards for JEE Chemistry - Some Basic Concepts Of Chemistry Class 11

 Page 1


Some Basic Concepts of Chemistry
Flash cards
Page 2


Some Basic Concepts of Chemistry
Flash cards
Laws of Chemical combination (Continued)
(i) Law of conservation of mass - [Lavoisier]
Matter is neither created nor destroyed in the course of 
chemical reaction although it may change from one form to 
other
Page 3


Some Basic Concepts of Chemistry
Flash cards
Laws of Chemical combination (Continued)
(i) Law of conservation of mass - [Lavoisier]
Matter is neither created nor destroyed in the course of 
chemical reaction although it may change from one form to 
other
Laws of Chemical combination (Continued)
(ii) Law of definite proportion [Proust]
The composition of a compound always remains constant (i.e. 
the ratio of weights of different elements in a compound) no 
matter by whatever method, it is prepared or obtained from 
different sources.
Page 4


Some Basic Concepts of Chemistry
Flash cards
Laws of Chemical combination (Continued)
(i) Law of conservation of mass - [Lavoisier]
Matter is neither created nor destroyed in the course of 
chemical reaction although it may change from one form to 
other
Laws of Chemical combination (Continued)
(ii) Law of definite proportion [Proust]
The composition of a compound always remains constant (i.e. 
the ratio of weights of different elements in a compound) no 
matter by whatever method, it is prepared or obtained from 
different sources.
Laws of Chemical combination (Continued)
(iii) Law of multiple proportion [John Dalton]
According to this law, when two elements A and B combine to 
form more than one chemical compound then different 
weights of A, which combine with a fixed weight of B, are in a 
proportion of simple whole number.
Page 5


Some Basic Concepts of Chemistry
Flash cards
Laws of Chemical combination (Continued)
(i) Law of conservation of mass - [Lavoisier]
Matter is neither created nor destroyed in the course of 
chemical reaction although it may change from one form to 
other
Laws of Chemical combination (Continued)
(ii) Law of definite proportion [Proust]
The composition of a compound always remains constant (i.e. 
the ratio of weights of different elements in a compound) no 
matter by whatever method, it is prepared or obtained from 
different sources.
Laws of Chemical combination (Continued)
(iii) Law of multiple proportion [John Dalton]
According to this law, when two elements A and B combine to 
form more than one chemical compound then different 
weights of A, which combine with a fixed weight of B, are in a 
proportion of simple whole number.
Laws of Chemical combination(Continued)
(iv) Law of reciprocal proportions [Ritche]
If two elements A and B combine separately with third 
element C to form two different compounds and if A and B 
also combine together to form a compound then they do so in 
a ratio of their masses equal or multiple or submultiples of 
ratio of their masses which combine with a definite mass of C.