(a)(i) List three observable changes that take place when a dilute solution of copper (II) chloride is electrolysed using platinum electrodes. Stage III

(ii) Calculate the quantity of electricity used during electrolysis when a current of 0.21 ampere flows for 2 hours.

(iii) State what is meant by the term preferential discharge of ions in electrolysis

(iv) Give one factor which influences the preferentia! discharge of ions during electrolysis.

(v) State one Q difference between-a conductor and an electrolyte.

(b) Consider the reaction represented by the equation below: Na\(_2\)S\(_2\)O\(_{3(aq)}\) + 2HCI\(_{(aq)}\) \(\to\) 2NaCI\(_{(aq)}\) + H\(_2\)O\(_{(l)}\) + SO\(_{2(g)}\) + S\(_{(s)}\)

(i) List two factors that can affect the rate of this reaction.

(i) Which of the products can be readily used to measure the rate of the reaction. Give a reason for your answer.

(iii) Name two instruments that can be used to measure factors in (b)(i) above.

(c)(i) State the reasons for regarding rusting and burning as oxidation processes.

(ii) I. Write the balanced half equations for the following redox reaction: Mg\(_{(s)}\) + Fe\(^{2+}_{(aq)}\) ----> Mg\(^{2+}_{(aq)}\) + Fe\(_{(s)}\)

II. Which of the reactants is the oxidizing agent?

Ill. State the change in the oxidation number of the oxidizing agent.

(d)(i) State one ore from which each of the following metals can be extracted. I. Tin II. Iron (ii) List two uses of copper (iii) Name one alloy of tin.

What type of device is a 3 1/2 inch floppy drive?

• A) Input
• B) Output
• C) Software
• D) Storage

Which of the following factors does not affect the the electric resistance of a wire?

• A. length
• B. mass
• C. temperature
• D. cross sectional area

A piece of copper of mass 30g loses 60J of heat energy. If the specific heat capacity of copper is 400J\(kg^{-1}K^{-1}\), Calculate the change in the temperature of the copper

• A. 0.2K
• B. 0.8K
• C. 2K
• D. 5K

WASSCE 2022 ENGLISH LANGUAGE 3 ORAL (OBJECTIVES TEST)

lynch

• A. flee
• B. dye
• C. you
• D. lick

A narrative poem that relates heroic exploits is an___________

• A. Epilogue
• B. Epitaph
• C. Epic
• D. Epigram

The flow of a river at the lower course is slow because

• A. thick vegetation cover affects free flow of water
• B. of the increase in human activities
• C. the gradient is greatly reduced
• D. of the increase in the volume of water

Nigeria’s quest for a leadership role in Africa hinges principally on her

• A. military might
• B. size and population
• C. generosity
• D. economic strength

This question is based on selected poems from R. Johnson and D. Ker et al (eds.): New Poetry from Africa : Wole Soyinka (ed.): Poems of Black Africa; K.E. Senanu and T. Vincent (eds.): A selection of African Poetry and E.W.Parker (ed.): A Pageant of Longer Poems.

In Rubadiri's 'Stanley Meets Mutesa' the king receives the explorer with

• A. suspicion
• B. delight
• C. optimism
• D. relief

Choose the option opposite in meaning to the underlined word. My father is always veryfrank about intentions?

• A. open
• B. objective
• C. secretive
• D. deceitful