Chemistry 9 Chapter 7 - Electro Chemistry - 4

Chemistry 9 Chapter 7 - Electro Chemistry - 4

1. The process of producing a metal from its ores always involves?

a) Condensation reaction
b) Oxidation reduction reaction
c) Sublimation
d) Hydrogenation

2. Device that convert chemical energy into electrical energy is known as?

a) Barometer

b) Electrochemical cell

c) Stethoscope

d) Thermometer

3. How many types do electrochemical cell have?

a) Four

b) Five
c) Three

d) Two

4. An electrochemical cell that uses electrical energy to drive achemical reaction is known as?

a) Galvanic cell
b) Body cell

c) None

d) Electrolytic cell

5. An electrochemical cell that converts chemical energy intoelectricity is called as?

a) None
b) Body cell

c) Galvanic cell

d) Electrolytic cell

6. A physical or chemical change that occurs by itself is known as?

a) Non spontaneous process
b) Physical process
c) Chemical process

d) Spontaneous process

7. Which one of the following is a non spontaneous process?

a) Flowing of water from lower to higher level

b) Rusting of iron in an open air

c) All of these
d) Flowing of water from higher to lower level

8. A substance that conducts electricity when it is dissolved inwater or in the molten state is known as?

a) None
b) Electrolyte

c) Non electrolyte
d) Electrochemical cell

9. Which one of the following is an electrolyte?

a) NaCl

b) HCl

c) KCl

d) All of these

10. Which one of the following is a non electrolyte?

a) Urea

b) NaOH

c) NaCl

d) KCl

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