JAMB Chemistry Past Questions & Answers - Page 142

706.
707.

The I.U.P.A.C name for the compound

A.

2-methyl-3-pentene

B.

4-methyl-2-pentane

C.

2-methyl-2-pentene

D.

4-methylpent-2-ene

E.

2-methyl-3-pentane

Correct answer is D

the IUPAC name of the given compound is 4 - methyl pent- 2- ene.

708.

The oxidation of

A.

2-butanone

B.

2-butanal

C.

butane

D.

butanoic acid

E.

3-butanal

Correct answer is A

No explanation has been provided for this answer.

709.

Use the above options to the question. The products formed on hydrolysis of

A.

A

B.

B

C.

C

D.

D

E.

E

Correct answer is C

No explanation has been provided for this answer.

710.

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If the molar mass of X is 36 g, the number of moles of X dissolved at 343 K is

A.

0.2 moles

B.

0.7 moles

C.

1.5 moles

D.

2.0 moles

E.

3.0 moles

Correct answer is D

The molar mass of x = 36g. At 343k, 72g of x dissolved 

Molarity of x = \(\frac{72}{36}\) = 2.00moles.