IS_Section Quiz_9.4-9.5_e

Both limestone and marble contain sodium carbonate.

• True

• False

Natural rainwater is neutral with a pH value of 7.

• True

• False

The stronger the acid, the more corrosive the acid.

• True

• False

Nitrogen oxides are alkaline gases.

• True

• False

Some plants cannot grow well in acidic soils.

• True

• False

Citric acid and carbonic acid are weak acids.

• True

• False

When diluting a concentrated alkali, we should add a large amount of water to the alkali.

• True

• False

Which of the following substances contain calcium carbonate?

(1) Chalk

(2) Pearl

(3) Seashell

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

Which of the following is NOT a product of the reaction between an acid and marble?

• A. Carbon dioxide

• B. Oxygen

• C. Salt

• D. Water

Which of the following are the expected observations of the experiment?

(1) Colourless gas bubbles are formed.

(2) The size of the zinc metal increases.

(3) Heat is released.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)