Free Printable Chemcial Reactions

1.

Reactions in which two or more substance combine to form a single compound are called (a)

2.

Photosynthesis is an ................... reaction

a)

Exothermic

b)

Endothermic

3.

Which among the following is not an exothermic reaction?

a)

Respiration

b)

Conversion of Water into ice

c)

Mixing of Quick lime with water

d)

Decomposition of Ferrous sulphate

4.

$Fe\ +CuSO_4------->\ FeSO_{4\ }+\ Cu$

a)

Decomposition Reaction

b)

Combination Reaction

c)

Displacement

d)

Double Displacement

5.

A Compound 'X' on heating decomposes and give brown fumes along with a yellow residue. Identify X.

a)

X = Ferrous Sulphate

b)

X= Calcium Carbonate

c)

X = Lead Chloride

d)

X = Laad Nitrate

6.

When Barium chloride is treated with sodium sulphate a white Precipitate is formed. What is this white precipitate and what kind of reaction is this?

a)

Barium Sulphate, Displacement reaction

b)

Sodium Chloride, Displacement reaction

c)

Barium Sulphate, Double Displacement reaction

d)

Sodium Chloride, Double Displacement reaction

7.

Rancidity is an example of ...................

a)

Reduction

b)

Oxidation

c)

Combination

d)

Displacement

8.

Why does walls after whitewashing with a solution of quick lime (CaO) turns shiny white?

a)

Due to formation of Calcium Carbonate

b)

Due to formation of Calcium Hydrogen Carbonate

c)

Due to formation of Calcium Hydroxide

d)

Due to formation of Calcium chloride

9.

$Pb\left(NO_3\right)_2\ +\ KI\ ---->\ PbI_2\ +\ KNO_3\ is\ an\ example\ of:$

a)

Double displacement and Neutralisation

b)

Double Displacement and Precipitation

c)

Displacement and Precipitation

d)

Displacement and Neutralisation

10.

$In\ reaction\ CuO\ +\ H_{2\ }\ \ --->\ Cu\ +\ H_2O,$

a)

CuO is getting oxidized

b)

Hydrogen is getting reduced

c)

CuO is getting reduced and acts as reducing agent

d)

CuO is getting reduced and acts as oxidizing aggent

11.

All decomposition reactions are endothermic.

a)

True

b)

False

12.

Decomposition of water on electrolysis is photo decomposition

a)

True

b)

False

13.

Gain of Oxygen is reduction.

a)

True

b)

False

14.

When iron reacts with copper sulphate the colour of solution changes from blue to green.

a)

True

b)

False

15.

Ferrous sulphate on decomposition gives smell of burning sulphur.

a)

True

b)

False

Chemcial Reactions

Total questions: 15

Worksheet time: 15mins

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