JAMB Chemistry Past Questions & Answers - Page 121

601.

The compound above contains

A.

Sp 3 hybridized carbon atoms only

B.

Sp 2 hybridized carbon atoms only

C.

Sp 3 and Sp hybirdized carbon atoms

D.

Sp 3 and Sp 2

Correct answer is D

No explanation has been provided for this answer.

603.

How many more isomers of the compound above can be obtained ?

A.

5

B.

4

C.

3

D.

2

Correct answer is B

No explanation has been provided for this answer.

604.

The IUPAC nomenclature of the organic compound with the above structural formula is

A.

3-ethyl-2,5-dimethylhexane

B.

4-ethyl-2,5-dimethylhexane

C.

3-ethyl-2,5,5 - trimethylpentane

D.

3-ethyl, 1,1,4-trimethylpentane

Correct answer is A

The name of the compound is 3 - ethyl - 2,5 - dimethylhexane.

605.

In the diagram above the gas Y could be

A.

hydrogen chloride

B.

oxygen

C.

carbon (IV) oxide

D.

chlorine

Correct answer is A

- Two gases that can be used in the study of fountain experiment is ammonia gas and hydrogen chloride gas.

- Ammonia dissolves into the water and the pressure in the container drops. As a result, more water is forced into the container from another inlet creating a fountain effect.

- All the hydrogen chloride in the flask dissolves in the water drops from the pipette, creating a vacuum in the flask. Water is then sucked up at great speed from the bowl, creating a spectacular 'fountain' in the flask.