Chemistry questions and answers

Chemistry Questions and Answers

Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.

3,261.

Lucas reagent is used to test for?

A.

alkanes

B.

alkanoic acids

C.

alkanols

D.

amines

Correct answer is C

Lucas' reagent is a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is used to classify alcohols.

3,262.

Which of the following class of compounds can exist as dipolar ions in solution?

A.

Alkanoic acid

B.

Fatty acids

C.

Dialkanoic acids

D.

Amino acids

Correct answer is D

No explanation has been provided for this answer.

3,263.

Which of the following molecules has two other positional isomers?

A.

CH3CH2Br

B.

CH3CHBrCH3

C.

CBr2F2

D.

CH2CHBrCH2Br

Correct answer is B

Positional isomers of C\(_3\)H\(_7\)Br : 1- bromo propane and 2- bromo propane

3,264.

A cracking process in petroleum refining can be represented by

A.

heptane to heptene

B.

heptane to 3-methylhexane

C.

heptane to propene and butane

D.

heptane to 2,3,3-trimethybutane

Correct answer is C

No explanation has been provided for this answer.

3,265.

One of the products of the thermal decomposition of sodium trioxonitrate (V) is?

A.

sodium

B.

nitrogen

C.

sodium dioxonitrate (III)

D.

sodium oxide

Correct answer is C

No explanation has been provided for this answer.