IS_Unit9_Checkpoint 9.4_E

1. Why was the metal pot damaged after cooking pork knuckles and ginger stew?

• The acids in them reacted with the metal pot.

• The alkalis in them reacted with the metal pot.

2. What happens when a piece of marble is added to dilute nitric acid?

• A. Carbon dioxide is produced.

• B. Hydrogen is produced.

• C. Carbon dioxide and hydrogen are produced.

• D. Oxygen is produced.

[E] 3(a) Complete the word equations.

• hydrogen

• carbon dioxide

• nitrogen

• chlorine

[E] 3(b) Complete the word equations.

• zinc nitrate

• zinc sulphate

• zinc chloride

• zinc carbonate

[E] 3(c) Complete the word equations.

• calcium sulphate

• calcium carbonate

• calcium chloride

• calcium