JAMB Chemistry Past Questions & Answers - Page 114

566.

How many carbon atoms are there in a benzene ring?

A.

4

B.

5

C.

6

D.

7

E.

8

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

567.

If 200cm ³ of a gas at s.t.p. has a mass of 0.268g, what is its molar mass? (Molar volume of a gas at s.t.p. = 22.4 dm³)

A.

300g

B.

200g

C.

150g

D.

30g

E.

15g

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

568.

Which of the following hydrocarbons is not likely to be present in petrol?

A.

C₁₄H₃₀

B.

C₁₀H₂₂

C.

C₉H₂₀

D.

C₇H₁₆

E.

C₅H₁₂

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

569.

The earthly impurities in iron ore are removed in the blast furnace by the reaction

A.

CO₂ + C →2CO

B.

Fe₂O₃ + 3CO →2Fe + 3CO₂

C.

SiO₂ + CaO →CaSiO₃

D.

CaCO₃ → CaO + CO₂

E.

C +CO₂ → CO₂

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

570.

120cm³ of hydrogen were sparked with 60cm ³ of oxygen at 110^oC. What was the volume of stream produced? The equation for the reaction is 2H_2(g) + O_2(g) → 2H₂O_(g)

A.

30cm₃

B.

60cm₃

C.

90cm₃

D.

120cm₃

E.

180cm₃

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

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