Chemistry - 9 Chapter - 2Chemical combination and Chemical EquationsTest - 4

Chemistry - 9 Chapter - 2
Chemical combination and Chemical Equations
Test - 4

1. Average atomic mass of chlorine is 35 ?.

a) True
b) False

2. N₂ is the molecular formula of nitrogen

a) False
b) True

3. The chemical formula is used to represent only an element in terms of symbols

a) False
b) True

4. In sand (SiO₂) the atoms of silicon and oxygen are arranged in such a way that there is a simple ratio of 1:4 between them.

a) True
b) False

5. The molecular formula of hydrogen peroxide is same as that of water.

a) True
b) False

6. C-12 is taken as standard reference of atomic number.

a) False
b) True

7. nitrogen and hydrogen, is an addition reaction.

a) True
b) False

8. 1 mole of water =18g.

a) True
b) False

9. Formation of ammonia, by the chemical combination of A chemical equation must not obey law of conservation of mass.

a) True
b) False

10. A reversible reaction is indicated by

a) False
b) True

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