JAMB Chemistry Past Questions & Answers - Page 365

1,821.

An emulsion may be produced by shaking a detergent solution with

A.

palm wine

B.

ethanoic acid

C.

palm oil

D.

water

Correct answer is C

No explanation has been provided for this answer.

1,822.

One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is

A.

CH3C ≡ CH

B.

CH3CH = CH2

C.

CH3CH2C ≡ CH

D.

CH3CH2 CH3

Correct answer is A

2VD = Rmm VD = Vapour density; Rmm - Relative
2 * 20 = 40 Molecular mass
Mole of carbon = 36/12 = 3
Mole of H2 = 40 - 36 = 4
The compound contains 3 mole of carbon and 4 hydrogen

1,823.

CH3 - CH2 - CCH
The hybridization in the compound above is

A.

Sp2

B.

sp

C.

sp3 and sp2

D.

sp3 and sp

Correct answer is D

No explanation has been provided for this answer.

1,824.

Which of the following has an isomer?

A.

C6H6

B.

C2H6

C.

C4H10

D.

C2H4

Correct answer is C

No explanation has been provided for this answer.

1,825.

An example of aliphatic unsaturated hydrocarbon is

A.

pentane

B.

butanol

C.

propene

D.

benzene

Correct answer is C

No explanation has been provided for this answer.