Chemistry revision

Choose the correct answer

• A

• B

• C

• D

• A

• B

• C

• D

Which row shows a chemical test for the presence of water?

• A

• B

• C

• D

The Haber process is used to make ammonia. Which statement about the Haber process is NOT correct?

• A vanadium oxide catalyst is used

• The nitrogen used is obtained from the air

• The pressure used is 200 atm

• The temperature used is 450 degree celcius

Underwater pipes made from steel are prevented from rusting by sacrifitial protection. Sacrifitial protection uses a ___1____ reactive metal attached to the pipe which is ___2___ in preference to the steel.

• less, oxidised

• less, reduced

• more, oxidised

• more, reduced

Source of nitrogen and hydrogen used in the Haber process

• A

• B

• C

• D

Gases from a car engine pass through the catalytic converter in the exhaust system of the car. Which gases are at lower concentration when they leave the catalytic converter?

• Carbon dioxide and nitrogen

• Carbon dioxide and nitrogen oxide

• Carbon monoxide and nitrogen

• carbon monoxide and nitrogen oxides

Which row describes how hydrogen and nitrogen are obtained for use in the Haber process?

• A

• B

• C

• D

What reaction does not occur in the blast furnace?

• A

• B

• C

• D

Choose one correct answer

• 1 and 2

• 1 and 3

• 2 and 3

• 1, 2 and 3