WAEC Chemistry Past Questions & Answers - Page 259

1,291.

An alkene may be converted to an alkane by

A.

halogenation

B.

hydrolysis

C.

dehydration

D.

hydrogenation

E.

decomposition

Correct answer is D

No explanation has been provided for this answer.

1,292.

Producer gas is a mixture of

A.

oxygen and hydrogen

B.

Hydrogen and nitrogen

C.

nitrogen and oxygen

D.

nitrogen and carbon (ll) oxide

E.

hydrogen and carbon (ll) oxide

Correct answer is D

No explanation has been provided for this answer.

1,293.

In which of the following pairs are both substances deliquescent?

A.

CaCI2 and H2SO4

B.

NaOH and MgSO4 7H2O

C.

CaCI2 and NaOH

D.

CUO and NaCI

E.

CaCO3 and MgCI2

Correct answer is C

No explanation has been provided for this answer.

1,294.

Which of the following compounds of tin is a strong reducing agent?

A.

SnCI2

B.

SnCI4

C.

SnO2

D.

SnH4

E.

Sn(OH)2

Correct answer is D

No explanation has been provided for this answer.

1,295.

When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is

A.

Y2O

B.

YNO2

C.

Y2O3

D.

Y (NO2)2

E.

YO2

Correct answer is B

No explanation has been provided for this answer.