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Electrochemistry

1. 

Which one of the following is correctly matched?

A. conductor - copper B. semi - conductor -silver C. insulator - rusting of iron D. corrosion - rubber

Answer : A. conductor - copper

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2. 

Which one of the following pais of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights electric shavers ,etc..?

A. Nickel and Cadmium B. Zinc and carbon C. Lead peroxide and lead D. Lead and cadmium

Answer : A. Nickel and Cadmium

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3. 

the substance used in manufacture of high voltage insulators is

A. Natural rubber B. Silicons C. Silicon carbide D. Synthetic rubber

Answer : B. Silicons

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4. 

What happens to the equivalent conductance of an electrolyte on dilution?

A. decreases B. increases C. remains constant D. may increase or decrease depending on the electrolyte

Answer : D. may increase or decrease depending on the electrolyte

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5. 

Copper sulphate solution conducts the currrent by

A. electrons B. ions C. semi-conduction D. mixed conduction

Answer : B. ions

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6. 

Which of the following electronic configuration is the stablest?

A. d2 B. p2 C. s2 D. f2

Answer : C. s2

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