Chemistry

Question 1

1Iron is extracted from its ore in the

Easy

A. Contact process B. blast furnace C. fractionating column D. electrolytic cell

Question 2

2Permanent hardness of water is caused by dissolved

Hard

A. carbon dioxide B. sodium chloride C. calcium and magnesium sulphates D. calcium hydrogencarbonate

Question 3

3Acid rain is caused mainly by

Easy

A. oxygen B. sulphur dioxide and nitrogen oxides C. water vapour only D. argon

Question 4

4The Haber process uses an iron catalyst to make

Hard

A. sulphuric acid B. nitric acid C. chlorine D. ammonia

Question 5

5Hard water contains dissolved

Easy

A. carbon dioxide only B. calcium and magnesium salts C. sodium chloride D. nitrogen

Question 6

6In the Solvay process, the main product is

Hard

A. sulphuric acid B. ammonia C. nitric acid D. sodium carbonate

Question 7

7In the extraction of iron, limestone is added to the blast furnace to

Hard

A. remove silica impurities as slag B. oxidise carbon C. provide heat only D. reduce the iron ore

Question 8

8Sulphuric acid is manufactured by the

Easy

A. Ostwald process B. Solvay process C. Haber process D. Contact process

Question 9

9Ozone layer depletion is caused mainly by

Hard

A. nitrogen B. carbon dioxide C. water vapour D. CFCs

Question 10

10Acid rain is mainly caused by

Easy

A. water vapour B. carbon monoxide only C. oxygen and nitrogen D. sulphur dioxide and oxides of nitrogen