WAEC Past Questions and Answers - Page 1830

9,146.

Weeds which produce light and numerous seeds are normally dispersed by

A.

Wind

B.

Water

C.

Animals

D.

Insects

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

9,147.

Mealy bug is a major pest of

A.

Citrus

B.

Cassava

C.

Maize

D.

Oil palm

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

9,148.

Which of the following is not a naturally occurring iron ore?

A.

FeCl₂

B.

Fe₂O₃O₃

C.

Fe₂O₃

D.

FeCO₃

E.

FeS₂

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

9,149.

Water gas is a mixture of?

A.

CO_{2 and H₂}

B.

CO and H₂O

C.

CO₂ and CO

D.

CO and N₂

E.

CO and H₂

View answer & explanation

Correct answer is E

Electrolysis of a sodium hydroxide solution produces oxygen at the anode and hydrogen at the cathode.

9,150.

What volume of oxygen will be left unreacted when a mixture of 100cm³ of hydrogen and 200cm³ of oxygen are exploded in a eudiometer?

A.

300cm³

B.

200cm³

C.

150cm³

D.

100cm³

E.

50cm³

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

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Literature in English

Islamic Religious Knowledge

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