Unit#4: Electrochemistry

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1. Secondary cells are those which can be:

A Used once

B Recharged

C Discarded easily

D Used only in labs

2. Electrolysis is the process of:

A Producing electricity

B Using electricity to cause chemical change

C Neutralization reaction

D Spontaneous reaction

3. Hydrogen-oxygen fuel cell uses:

A Hydrogen as oxidant

B Oxygen as fuel

C Hydrogen as fuel

D Water as fuel

4. The purpose of a salt bridge in a galvanic cell is to:

A Produce electrons

B Complete the circuit

C Increase voltage

D Stop oxidation

5. A battery is made up of:

A One cell

B Two or more cells

C Only electrodes

D Only electrolyte

6. In electrolysis of aqueous NaCl, hydrogen is released at:

A Anode

B Cathode

C Salt bridge

D Electrolyte

7. Electroplating is used to:

A Purify metals

B Extract metals

C Coat one metal with another

D Produce electricity

8. A lead-acid battery is commonly used in:

A Watches

B Mobile phones

C Cars

D Torches

9. An electrochemical cell converts chemical energy into:

A Heat energy

B Mechanical energy

C Electrical energy

D Nuclear energy

10. Electrolysis of molten compounds is preferred because:

A Water interferes

B Electricity is cheap

C It gives less product

D Reaction is spontaneous

Unit#4: Electrochemistry

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