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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.

1,016.

What is the IUPAC name of CH3CCI=C(CH3)2?

A.

2-chloro -3 methylbut -2yne

B.

2 -chloro -3 methylbut -2ene

C.

2 -chloro -3 methylbutene

D.

3- methyl -2-chlorobut -2-ene

E.

3- methyl -2. chlorobut -2 yne

Correct answer is B

No explanation has been provided for this answer.

1,017.

Which formula is used to indicate the degree of acidity of an acid?

A.

[H+]=mass of acid relativemolecularmassofacid

B.

F = number of H+ = ions x molar mass of the acid

C.

Kw = [H+][OH-]

D.

pH = - log10[H+]

E.

pKa = -log10Ka

Correct answer is D

No explanation has been provided for this answer.

1,018.

Which compound will give propane when it Is dehy drated by an excess of hot, concentrated tetraoxosvlphate(VI) acid?

A.

CH3CH2CHO

B.

CH3CH2CH2OH

C.

CH3CH2COQH

D.

CH3CH20CH

E.

CH3CH3OH

Correct answer is B

No explanation has been provided for this answer.

1,019.

A calcium atom and a calcium ion have the same

A.

chemical properties

B.

electric charge

C.

electronic structure

D.

number of electrons

E.

number of neutrons

Correct answer is E

No explanation has been provided for this answer.

1,020.

Which is NOT a synthetic polymer?

A.

nylon

B.

Orion

C.

Perspex

D.

polystyrene

E.

wool

Correct answer is E

No explanation has been provided for this answer.