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UTME Chemistry 1983 Past Questions and Answers, Jamb, Pre-degree, Nursing, Waec, Neco

UTME Chemistry 1983 Past Questions and Answers

1. The equilibrium reaction between copper (l) chloride and chlorine at 25oC and 1 atmosphere is represented by the equation:

2CuCl +Cl2 ⇌ 2 CuCl2 ∆H = – 166 KJ. Which of the following statements is TRUE for the reaction, pressure remaining constant?

Options

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A) more CuCl is formed at 40oC

B) more CuCl2 is formed at 10oC

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C) Less CuCl2 is formed at 10oC

D) there is no change in the amount of CuCl2 formed at 40oC and10oC

E) more CuCl is consumed at 40oC

The correct answer is B.

2. zn + 2HCl → ZnCl2 + H2The rate of the above reaction will be greatly increased if

Options

A) the zinc is in the powered form

B) a greater volume of the acid is used

C) a smaller volume of the acid is used

D) the reaction vessel is immersed in an ice-bath

E) the zinc is in the form of pellets

The correct answer is A.

3. Zn + H2 SO4 → ZnSO4 + H2

In the above reaction how much Zinc will be left of 1.0 M of H2SO?

[Zn =65, s = 32, O = 16, H = 1]

Options

A) 1.35g

B) 1.00g

C) 0.70g

D) 0.65g

E) 0.00g

The correct answer is A.

4. 30 cm3 of 0.1 M Al (NO3)3 SOLUTION IS RECTED WITH 100cm3 of 0.15M of NaOH solution. Which reactant is in excess, and by now much ?

Options

A) NaOH solution by 70 cm3

B) NaOH solution, by 60 cm3

C) NaOH solution by 40 cm3

D) Al(NO3)3 solution by 20 cm3

E) Al(NO3)3 solution by 10 cm3

The correct answer is C.

5. Which of the following is a neutralization reaction?

Options

A) Addition of sodium chloride solution to potassium chloride solution

B) Addition of trioxonitrate (V) acid (nitric acid) to distilled water

C) Addition of trioxonitrate (V) acid (nitric acid) to tetraoxosulphate (IV) acid (sulphuric acid)

D) Addition of trioxonitrate (V) acid (nitric acid) to potassium trioxonitrate (V) (potassium nitrate) solution

E) Addition of trioxonitrate (V) acid (nitric acid) to potassium hydroxide solution

The correct answer is E.

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