Q1 of 22 Page 113

The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of______

a) Reciprocal proportion b) definite proportion c) multiple proportions

(b) definite proportion

Because the law of definite proportion says that a pure chemical compound prepared by using any chemical method consists of the same elements which combine together in a fixed ratio by mass.


More from this chapter

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1

In water, hydrogen and oxygen are combined in the ratio of ____by mass.

a) 1:8 b) 8:1 c) 2:3

 1

Which one of the following is a wrong statement, regarding the postulates of Dalton’s Atomic Theory?

a) The matter is made up of small indivisible particles called atoms.


b) Atoms of the same element are different in all respects.


c) Atoms of different elements are different in all respects.

 1

Dalton’s Atomic Theory successfully explained the Law of ______.

i) Conservation of Mass


ii) Definite Proportions


iii) Radioactivity


iv) Multiple Proportions


a) (i), (ii) and (iii) b) (i), (iii) and (iv) c) (i) ,(ii) and (iv)

 1

Based on the Thomson’s model of an atom, say which of the following statements are correct.

i) The positive charge is assumed to be uniformly distributed over the atom.


ii) The electrons are uniformly distributed in the positively charged sphere.


iii) The electrons attract each other to stabilize the atom.


iv) The mass of the atom is assumed to be uniformly distributed over the atom.


a) (i) ,(ii) and (iv) b) (i),(ii) and (iii) c) (i) and (iii)