Chapter 6 Acid and Alkali

Which of the following about properties of acid is not true?

• pH less than 7

• Tastes bitter

• Corrosive

• Turns blue litmus paper to red

Acid reacts with metal to produce ___________ gas.

• oxygen

• carbon dioxide

• hydrogen

• nitrogen dioxide

Tags

NGSS.MS-PS1-2

Which of the following will change the red litmus paper to blue?

• Sodium hydroxide

• Hydrochloric acid

• Sulphuric acid

• Nitric acid

Which of the following indicator will show different colour in acid, neutral and alkali?

• Phenolphtalein

• Universal indicator

• Methyl orange

• Litmus paper

__________ is used to make fizzy drink.

• Vinegar

• Sulphuric acid

• Carbonic acid

• Acetic acid

Sodium hydroxide is used

• to make fertilisers.

• to make battery.

• to cure gastritis.

• to make detergent.

The chemical reaction between an acid and alkali is called

• respiration.

• combustion.

• neutralisation.

• photosynthesis.

Tags

NGSS.MS-PS1-5

Hydrochloric acid + Sodium hyroxide  $\rightarrow$   ____________ + Water

• Sodium sulphate

• Sodium chloride

• Sodium nitrate

Tags

NGSS.MS-PS1-2

________ + Potassium hydroxide  $\rightarrow$  Potassium sulphate + Water

• Sulphuric acid

• Hydrochloric acid

• Nitric acid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Nitric acid + __________  $\rightarrow$  Sodium nitrate + Water

• Aluminium oxide

• Magnesium hydroxide

• Sodium hydroxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5