Question 1

Which of the following substances is a strong base?

Accepted Answer

Sodium hydroxide (NaOH)

Answer

Citric acid (C6H8O7)

Answer

Acetic acid (CH3COOH)

Answer

Hydrochloric acid (HCl)

Question 2

What is the neutral pH value of pure water?

Accepted Answer

7

Answer

10

Answer

14

Answer

4

Question 3

What is formed when an acid reacts with a base?

Accepted Answer

Salt and water

Answer

Hydrogen gas

Answer

Oxygen gas

Answer

Carbon dioxide

Question 4

What type of reaction occurs when an acid and a metal react together?

Accepted Answer

Single displacement reaction

Answer

Combustion reaction

Answer

Double displacement reaction

Answer

Decomposition reaction

Question 5

What happens to litmus paper when it is placed in a basic solution?

Accepted Answer

It turns blue

Answer

It becomes colorless

Answer

It stays red

Answer

It turns green

Question 6

What is the effect of acids on blue litmus paper?

Accepted Answer

It turns red

Answer

It dissolves

Answer

It turns green

Answer

It stays blue

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