Jamb Chemistry Past Questions and Answers

Question 1676:

• JAMB 2012

A piece of filter paper moistened with lead (ll) ethanoate solution turns black when the paper is dropped into a gas likely to be

A. Sulphur (VI) oxide
B. Hydrogen chloride
C. Sulphur (VI) oxide
D. Hydrogen sulphide

Question 1677:

• JAMB 2012

Which of the following gases has a characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas?

A. N₂
B. N₂O
C. CI₂
D. NH₃

Question 1678:

• JAMB 2012

Commercial bleaching can be carried out using

A. Sulphur (IV) oxide and ammonia
B. Hydrogen sulphide and chlorine
C. Chlorine and sulphur (IV) oxide
D. Ammonia and chlorine

Question 1679:

• JAMB 2012

Mineral acids are usually added to commercial hydrogen peroxide to

A. Oxidize it
B. Decompose it
C. Minimize its decomposition
D. Reduce it to water and oxygen

Question 1680:

• JAMB 2012

Which of the following compounds will burn with a brick-red colour in a non-luminous Bunsen flame?

A. LiCI
B. NaCl
C. CaClN₂
D. MgClN₂