JAMB Past Questions and Answers - Page 1490

7,446.

The function of the copper (ll)tetraoxosulphate (IV) in dilute H2SO4 in the figure above is to

A.

dry the gas

B.

absorb phosphine impurity

C.

absorb ethene impurity

D.

from an acetylide with ethyne

Correct answer is B

No explanation has been provided for this answer.

7,447.

The IUPAC nomenclature for the compound above is

A.

dimethlhexane

B.

3,5 dimethylhexane

C.

1.1 dmethyl, 3 methylpentane

D.

2.4 dimethylhexane

Correct answer is D

No explanation has been provided for this answer.

7,448.

The two functional groups in the above compound are

A.

alcohol and amine

B.

acid and amine

C.

aldehyde and acid

D.

ketone and amine

Correct answer is B

No explanation has been provided for this answer.

7,449.

In the diagram above, curve X represents the energy profile for a homogeneous gaseous reaction. Which of the following conditions would produce curve Y for the same reaction?

A.

Increase in temperature

B.

Increase in the concentration of a reactant

C.

Addition of a catalyst

D.

Increase in pressure

Correct answer is C

No explanation has been provided for this answer.

7,450.

Half-cell reaction. From the data above , it can be deduced that the most powerful reducing agent of the four metals is

A.

Cu

B.

Fe

C.

Ba

D.

Zn

Correct answer is C

Elements with lower electrode potentials are most likely to be reduced and act as a reducing agent. Lower electrode potential indicates a greater tendency to accept electrons.