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.

2,316.

Sodium sulphate decahydrate (Na2SO4.10 H2O) on exposure to air loses all its water of crystallization.
The process of loss is known as

A.

efflorescence

B.

hygroscopy

C.

deliquescence

D.

effervescence

E.

dehydration

Correct answer is A

No explanation has been provided for this answer.

2,317.

A piece of burning sulphur will continue to burn in a gas jar of oxygen to give misty fumes which readily dissolved in water. The resulting liquid is

A.

sulphur (VI) trioxide

B.

tetraoxosulphate (VI) acid

C.

trioxosulphate (IV) acid

D.

dioxosulphate (II) acid

E.

hydrogen sulphide

Correct answer is C

No explanation has been provided for this answer.

2,318.

How many isomeric forms are there for the molecular formula C3H6Br2?

A.

1

B.

2

C.

3

D.

4

E.

5

Correct answer is D

No explanation has been provided for this answer.

2,319.

The correct name of the compound with the above structural formula is

A.

2-methylbut -1-ene

B.

2-methylbut -2-ene

C.

2-methylbutane

D.

2-ethylprop-1 -ene

E.

2-ethylprop-2-ene

Correct answer is A

C2H5 - CH=CH2

             CH3

the compound above is numbered from right to left and is named 2 - methyl but - 1 - ene.

2,320.

In the reaction Fe + Cu2+ \(\to\) Fe2+ + Cu,iron displaces copper ions to from copper. This is due to the fact that

A.

iron is in the metallic from while the copper is in the ionic from

B.

the atomic weight of copper is greater than that of iron

C.

copper is greater than iron

D.

copper metal has more electrons than iron metal

E.

iron is higher in the electrochemical series than copper

Correct answer is E

No explanation has been provided for this answer.