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UTME Chemistry 1982 JAMB Past Questions and Answers, Pre-degree, Nursing, Jupeb, Neco, Waec

UTME Chemistry 1982 JAMB Past Questions and Answers, Pre-degree, Nursing, Jupeb, Neco, Waec

1. In the preparation of carbon monoxide by heating ethanedioic acid with concentrated sulphuric acid, the concentrated sulphuric acid act as?

Options

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A) an oxidizing agent

B) a reducing agent

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C) a dehydrating agent

D) a reaction medium

E) a catalyst

The correct answer is C.

2. When copper powder is heated with concentrated sulphuric acid, the gas produced is?

Options

A) hydrogen sulphide

B) sulphur dioxide

C) sulphur trioxide

D) hydrogen pentasulphide

E) sulphur pentoxide

The correct answer is B.

3. Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, AgNO3, HNO3, HCl, NH3, HCl, NH3. In which case does the magnesium become covered with a dark precipitate?

Options

A) H2SO4

B) AgNO3

C) HNO3

D) NH3

E) HCl

The correct answer is B.

4. How many grams of methylacetylene (propyne) CH3 – C Ξ CH will completely discharge the colour of 8g of bromine?

(Br = 80, C = 12, H = 1)

Options

A) 0.5

B) 1.0

C) 2.0

D) 3.0

E) 4.0

The correct answer is B.

5. What weight of sodium hydroxide is required to make 500 cm3 of 0.2 M solution?(Na = 23, O = 16, H = 1)

Options

A) 40 g

B) 20 g

C) 10 g

D) 4 g

E) 2 g

The correct answer is D.

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