Quiz 14: WS10.4 Answers

Kowloon Tong School (Secondary Section)

F.2 Integrated Science Quiz 14: WS10.4

Words Translation (6 marks)

	Chinese term	English term
1	碳酸鈣	Calcium carbonate
2	氫	Hydrogen
3	石灰石	Limestone
4	腐蝕性的	Corrosive
5	大理石	Marble
6	爆鳴聲	‘pop’ sound

Fill in the Blanks (6 marks)

1        Some metals react with dilute acid and produce (1)hydrogen gas and heat. The metals

decrease in size because acids have (2)corrosive effect on these metals.

2        The gas produced in the reaction between acids and metals can be tested by a burning splint.

It burns with a (3)‘pop’ sound.

3        Some building materials such as (4)limestone and (5)marble contain (6)calcium carbonate,

which reacts quickly with dilute acids to give off carbon dioxide.

Challenging Questions (Bonus 2 marks)

Suggest how you test the following gases:

(a)    The gas produced in the reaction between acids and some metals:

To test the gas with a burning splint

(b)   The gas produced in the reaction between eggshells and acids:

To test the gas with lime water / hydrogencarbonate indicator