Chemistry 9 Chapter 7 - Electro Chemistry - 6

Chemistry 9 Chapter 7 - Electro Chemistry - 6

1. During the electrolysis of brine, sodium ions move towards?

a) Anode
b) Both of these
c) Cathode
d) None of these

2. Which one of the following is not a condition for a good electroplating?

a) High current density

b) High concentration of metal in its electrolyte

c) High temperature

d) Low temperature

3. The process in which a metal reacts with oxygen and moisture inthe atmosphere is called as?

a) Corrosion

b) Dehydration

c) Electroplating

d) Sublimation

4. Which one of the following is necessary for iron to rust?

a) Oxygen

b) Water

c) Both of these

d) None of these

5. A region of metal surface that has relatively less moisture, acts as?

a) None of these
b) Anode

c) Both of these

d) Cathode

6. Which one of the following methods is used to prevent corrosion?

a) Tinning
b) Alloying

c) All of these

d) Coating with paint

7. Stainless steel is not an alloy of?

a) Iron
b) Copper
c) Nickel
d) Chromium

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