WAEC Past Questions and Answers - Page 1596

7,979.

Consider the electrochemical cell represented below Zn(s)/Zn2+(aq)//Cu2+(aq)/Cu(s). Which of the following equations describes the reaction occurring in the cell?

A.

Cu(s) + Zn2+(aq) →Cu2+(aq) + Zn(s)

B.

Cu(s) + Zn(s) →Cu2+(aq) + Zn2+(aq)

C.

Zn(s) + Cu2+(aq) →Zn2+(aq) + Cu(s)

D.

Zn2+(aq) +Cu2+(aq) → Zn(s) + Cu(s)

Correct answer is C

No explanation has been provided for this answer.

7,980.

A reducing agent is expected to

A.

decolourize acidified KMnO4 solution

B.

decolourize acidified FeSO4 solution

C.

liberate CI2 from a chloride

D.

liberate CO2 from NaHCO3

Correct answer is A

No explanation has been provided for this answer.