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CBSE - Class 10 Science Chemical Reactions and Equations Worksheet

1.
Write the balanced chemical equation for the following and identify the type of reaction in each case. (d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)
2.
Translate the following statements into chemical equations and then balance them. (a) Hydrogen gas combines with nitrogen to form ammonia.
3.
Explain the following terms with one example each. (b) Rancidity
4.
Write the balanced chemical equation for the following and identify the type of reaction in each case. (c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)
5.

Which of the following represents a combination reaction?

a.

CaCO3 → CaO + CO2

b.

2Mg+ O→ 2MgO

c.

Fe + CuSO→ FeSO+ Cu

d.

AgNO? + NaCl → AgCl + NaNO?

6.

A chemical change may involve

a.

change in colour only

b.

change in temperature only

c.

evolution of gas only

d.

any or all of above

7.
Balance the following chemical equations. (b) $NaOH + H_2SO_4 \rightarrow Na_2SO_4 + H_2O$
8.
Translate the following statements into chemical equations and then balance them. (b) Hydrogen sulphide gas burns in air to give water and sulpur dioxide.
9.
Balance the following chemical equations. (d) $BaCl_2 + H_2SO_4 \rightarrow BaSO_4 + HCl$
10.

What is meant by arrow sign in a equation of chemical reaction?

a.

State of the matter 

b.

Type of reaction 

c.

Direction of reaction 

d.

Sign of equation 

11.
A shiny brown coloured element ‘$X$’ on heating in air becomes black in colour. Name the element ‘$X$’ and the black coloured compound formed.
12.
Balance the following chemical equations. (c) $NaCl + AgNO_3 \rightarrow AgCl + NaNO_3$
13.
Translate the following statements into chemical equations and then balance them. (c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
14.
Explain the following terms with one example each. (a) Corrosion
15.
Explain the following in terms of gain or loss of oxygen with two examples each. (b) Reduction
16.

What is called the components in LHS of a chemical reaction equation 

a.

Products

b.

Starter 

c.

Beginner 

d.

Reactants

17.
Write the balanced chemical equations for the following reactions. (c) Aluminium + Copper chloride → Aluminium chloride + Copper
18.

What is called the components in RHS of a equation of chemical reaction 

a.

Ending 

b.

Reactants 

c.

Products 

d.

Result 

19.
Why do we apply paint on iron articles?
20.

' ↑ ' sign means in a chemical equation 

a.

Solid

b.

Gas

c.

Liquid

d.

Level

Worksheet Answers

5.
Option A
6.
Option D
10.
Option C
16.
Option D
18.
Option C
20.
Option B

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