Free Printable CHEMICAL REACTIONS

1.

Give the ratio in which hydrogen and oxygen are present in water by volume.

a)

1: 2

b)

1: 1

c)

2:1

d)

1:8

2.

A Substance 'X' is used in white-washing and is obtained by heating limestone in absence of air. Identify 'X'

a)

$CaOCl_2$

b)

$Ca\left(OH\right)_2$

c)

$CaO$

d)

$CaCO_3$

3.

When Silver is exposed to air, a black coating is seen due to the formation of :

a)

$AgNO_3$

b)

$Ag_2S$

c)

$Ag_2O$

d)

$Ag_2CO_3$

4.

Which of the following is an Endothermic reaction?

a)

Dilution of Sulphuric acid

b)

Sublimation of Dry ice

c)

Condensation of water

d)

Respiration in animals

5.

What kind of reaction takes place when electricity is passed through water?

a)

Combination

b)

Single displacement

c)

Decomposition

d)

Double decomposition

6.

A substance added to food containing fats, oils are called :

a)

Antioxidant

b)

oxidant

c)

Rancid

d)

Coolant

7.

Which of the following gases can be used for storage?

a)

Carbon dioxide and oxygen

b)

Nitrogen and oxygen

c)

Carbon dioxide and nitrogen

d)

Nitrogen and Helium

8.

What happens when copper is dipped in Iron sulphate solution?

a)

Copper displaces Iron

b)

The blue colour of copper sulphate is obtained

c)

Reaction is exothermic

d)

No reaction

9.

A balanced chemical equation is in accordance with :

a)

Avogadro's Law

b)

Law of multiple proportions

c)

Law of conservation of mass

d)

Law of gaseous volumes

10.

$Zn+H_2SO_4\ \rightarrow\ ZnSO_4+H_2$
Above reaction is :

a)

Single displacement

b)

Double displacement

c)

Combination

d)

Decomposition

11.

$CuO\ +\ H_{2\ }\rightarrow\ H_2O\ +\ Cu$
This reaction is an example of :

a)

Only oxidation

b)

Only reduction

c)

Redox

d)

Synthesis

12.

Rusting of Iron is an example of :

a)

Reduction

b)

Oxidation

c)

Ionization

d)

Dissociation

13.

In which of the following chemical equations represents the correct states of reactants and products?

a)

$2H_2O_{\left(l\right)}+\ O_{2\left(l\right)}\ \rightarrow\ 2H_2O_{\left(g\right)}$

b)

$2H_2O_{\left(g\right)}+\ O_{2\left(l\right)}\ \rightarrow\ 2H_2O_{\left(l\right)}$

c)

$2H_2O_{\left(g\right)}+\ O_{2\left(g\right)}\ \rightarrow\ 2H_2O_{\left(g\right)}$

d)

$2H_2O_{\left(g\right)}+\ O_{2\left(g\right)}\ \rightarrow\ 2H_2O_{\left(l\right)}$

14.

$2KClO_{3\left(s\right)}\ \rightarrow\ 2KCl_{\left(s\right)}\ +\ 3O_2$
Which of the following statement is correct about the above reaction?

a)

It is a decomposition reaction and endothermic in nature.

b)

It is a Combination reaction and endothermic.

c)

It is a decomposition reaction and exothermic in nature.

d)

It is a Combination reaction and exothermic.

15.

$aFe_2O_3+bH_2O\ \rightarrow cFe\ +dH_2O$
In the above balanced equation, the vales of a,b,c and d respectively are:

a)

1,1,2,3

b)

1,3,1,2

c)

1,3,2,3

d)

1,2,2,3

CHEMICAL REACTIONS

Total questions: 15

Worksheet time: 8mins

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