Atoms Molecules And Chemical Arithmetic QUESTIONS AND ANSWERS

IIT JEE : Atoms Molecules And Chemical Arithmetic QUESTIONS AND ANSWERS :: part1 : 11 to 15

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

11.Which of the following best explains the law of conservation of mass?

No change in mass is observed when 2.0 g of Mg is heated in vacuum

1.2 g of carbon when burnt in excess if oxygen consumes only 3.2 g of it to form 4.4 g of carbon dioxide

12 g of carbon when heated in limited supply of air produces only 20 g of carbon monoxide

A sample of air in heating does not show any change in mass but volume increases.

12.Vapour density of a metal chloride is 77. The equivalent mass is 3. Its atomic mass would be

13.276 g of silver carbonate on being strongly heated yields a residue weighing

2.16 g

3.0 g

6.2 g

2.48 g.

14.Which of the following does not have same number of atoms?

1 g of oxygen and 1 gm-atom of hydrogen

1 g of oxygen and 1 gm of ozone

1 g of hydrogen and 1 gm-atom of hydrogen

4 g of calcium and 0.1 gm-atom of calcium.

15.The correctly reported difference of 18.3426 and 8.06 willhave significant figures equal to

three

four

five

six.

More Atoms Molecules And Chemical Arithmetic QUESTIONS AND ANSWERS available in next pages

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