JAMB Past Questions and Answers - Page 1371

6,851.

In the diagram above, X is the

A.

Enthalphy

B.

Activated complex

C.

Activation energy

D.

Enthalphy change

Correct answer is D

No explanation has been provided for this answer.

6,852.

The main features of the single system are that?

A.

Books of accounts are not maintained and business relies only on bank statement

B.

The journal records are absent and only the main ledger is kept 7

C.

There are incomplete classifications and recording procedures

D.

Only credit sales transactions and credit purchase are recorded

Correct answer is C

No explanation has been provided for this answer.

6,853.

n monosaccharide \( \underset{Q}{\stackrel{P}{\rightleftharpoons}} \) polysaccharide -n water.

In the process above, P and Q respectively represent

A.

Condensation and hydrolysis

B.

Fermentation and condensation

C.

Polymerization and hydrolysis

D.

Polymerization and condensation

Correct answer is A

No explanation has been provided for this answer.

6,854.

The compound above exhibits

A.

Geometric isomerism

B.

Positional isomerism

C.

Structural isomerism

D.

Optical isomerism

Correct answer is D

Optical isomers are molecules that are non-superimposable mirror images of each other and they are not identical. Molecules with a chiral carbon show this kind of isomerism. Chiral carbon, also known as asymmetric carbon, refers to carbon atom that are bonded to four different atoms or groups of atoms.

6,855.

MnO\(_4\)(aq) + Y + 5Fe\(^{2+}\) (aq) \(\mapsto\) Mn\(^{2+}\) (aq) + 5Fe\(^{3+}\) (aq) + 4H\(_2\)O (l).

In the equation above, Y is

A.

10H+ (aq)

B.

5H+ (aq)

C.

8H+ (aq)

D.

4H+ (aq)

Correct answer is C

No explanation has been provided for this answer.