Practice MCQ Questions and answers on Chemistry-GK

1

The components of water can be separated by

A) Physical methods B) Chemical methods C) Both A and B D) They can not be separated

Discuss

Answer & Solution

Answer: Option B

Solution:

The components of water can be separated by chemical methods.

2

Which of the following is not a chemical reaction?

A) Burning of paper B) Digestion of food C) Conversion of water into steam D) Burning of coal

Discuss

Answer & Solution

Answer: Option C

Solution:

The conversion of water into steam is an example of a physical change, where the state of the matter changes without changing its composition. A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, colour, volume and density.

3

Chemical formula of washing soda is

A) Na₂SO₄.10H₂O B) NaHCO₃ C) Na₂CO₃.10H₂O D) Ca(OH)₂

Discuss

Answer & Solution

Answer: Option C

Solution:

Chemical formula of washing soda is Na₂CO₃.10H₂O.

4

What is the chemical name for ‘Baking Soda’ ?

A) Sodium carbonate B) Sodium bicarbonate C) Sodium nitrite D) Sodium nitrate

Discuss

Answer & Solution

Answer: Option B

Solution:

Sodium bicarbonate is the chemical name for ‘Baking Soda’.

5

The chemical name of ‘Common salt’ is

A) Sodium chloride B) Sodium nitrate C) Ammonium chloride D) Calcium chloride

Discuss

Answer & Solution

Answer: Option A

Solution:

The chemical name of ‘Common salt’ is Sodium Chloride.

6

Rock salt is a mineral containing

A) Potassium
B) Magnesium C) Sodium D) Iron

Discuss

Answer & Solution

Answer: Option C

Solution:

Halite, commonly known as rock salt, is the mineral form of sodium chloride (NaCl). Halite forms isometric crystals. It commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides, and borates.

7

Baking soda is :

A) Potassium carbonate B) Sodium hydroxide C) Sodium carbonate D) Sodium bicarbonate

Discuss

Answer & Solution

Answer: Option D

Solution:

Baking soda is Sodium bicarbonate.

8

Sodium Carbonate is commonly known as

A) Baking Soda B) Washing Soda C) Caustic Soda D) Caustic Potash

Discuss

Answer & Solution

Answer: Option B

Solution:

Sodium Carbonate is commonly known as Washing Soda.

9

Brine refers to :

A) Salt water
B) Sweet water
C) Pure water
D) Starch water

Discuss

Answer & Solution

Answer: Option A

Solution:

Brine refers to water saturated or strongly impregnated with salt.

10

The chemical name of baking soda is

A) Sodium carbonate
B) Sodium bicarbonate C) Sodium chloride D) Sodium nitrate

Discuss

Answer & Solution

Answer: Option B

Solution:

The chemical name of baking soda is Sodium bicarbonate.