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UTME Chemistry 1981 JAMB Past Questions and Answers, Pre-degree, Nursing, Jupeb, Neco, Waec

UTME Chemistry 1981 JAMB Past Questions and Answers, Pre-degree, Nursing, Jupeb, Neco, Waec

1. Which of the following represents a precipitation reaction?

Options

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A) H2SO4 + NaCl →→ NaHSO4 + HCl

B) Fe +H2SO4 →→ FeSO4 + H2

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C) 4HCl + MnO2 →→ MnCl2 + 2H2O + Cl2

D) Na2SO4 + pb(NO3) →→ PbSO4 + 2NaNO

E) CuO +2HCl →→ Cl2 + H2O

The correct answer is D.

2. The IUPAC name for

UTME Chemistry 1981 Fig 1 Image 1

Options

A) 1-methlpentane

B) 3-methylbutane

C) 2-methylbutane

D) 1-dimethylpropane

E) 2-methylpentane

The correct answer is C.

3. An efflorescent compound is a substance that?

Options

A) absorbs water froom the air without dissolving in it

B) is capable of giving off coloured luminosity

C) gives out water to the atmosphere

D) absorbs water from the air and dissolves in it

E) gives out its water of crystallization on heating

The correct answer is C.

4. The general formula of an alkyl halide (which represent the halide) is?

Options

A) CnH2n – 2X

B) CnH2n + 1X

C) CnH2n + 2X

D) CnH2nX

E) CnH2n – 1

The correct answer is B.

5. Which one of the following metals is not normally extracted by chemical reduction because of its position in the electrochemical series?

Options

A) Copper

B) Iron

C) Lead

D) Potassium

E) Zinc

The correct answer is D.

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