JAMB Chemistry Past Questions & Answers - Page 56

276.

Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with

A.

Pb

B.

Zn

C.

Ca

D.

Na

Correct answer is A

No explanation has been provided for this answer.

277.

Burning magnesium ribbon in air removes which of the following
(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?

A.

i and iv only

B.

i, ii, iii and iv only

C.

i only

D.

i and ii only

Correct answer is C

No explanation has been provided for this answer.

278.

A synthetic rubber is not obtained from the polymerization of?

A.

neoprene

B.

isoprene

C.

butandiene

D.

hexane

Correct answer is D

No explanation has been provided for this answer.

279.

The IUPAC name of the compound CF\(_3\)CHBrCl is

A.

2-chloro-2-bromo-1,1,1-trifluoroethane

B.

2-bromo-2-chloro-1,1,1-trifluoroethane

C.

1-bromo-1-chloro-2,2,2-trifluoroethane

D.

1,1,1-trifluoro-2-bromo-2-chloroethane

Correct answer is B

No explanation has been provided for this answer.

280.

Hydrocarbons which will react with Tollen's reagent conform to the general formula

A.

C\(_n\)H\(_{2n}\)

B.

C\(_n\)H\(_{2n + 2}\)

C.

C\(_n\)H\(_{2n - 2}\)

D.

C\(_n\)H\(_{2n + 1}\)OH

Correct answer is D

No explanation has been provided for this answer.