Question

Battery
Read the passage and answer the questions.
In the Chemistry lab, Sunil and his friends
Problem solving
are conducting an experiment to
demonstrate the electroplating of a metall
spoon by electrolysis. They used the set-up
shown in the figure, but were
disappointed because the spoon
remained unchanged!
1. What do you think is wrong
Stainless steel
with the set-up they used?
a. The copper rod should
touch the bottom of the
beaker.
b. The stainless steel spoon
should touch the copper rod to complete the circuit.
C. The connections to the battery are incorrect.
-Cooper rod
spoon
coppersulhane
solution
2. What will happen if sodium chloride solution is used instead of
copper sulphate?
a. No reaction will take place because there are no ions in the electrolyte
b. A reaction will occur as long as the electrolyte contains positively and
negatively charged ions and the two electrodes are connected to the batters
c. There can be no electrolysis without copper sulphate.
3. Why are iron objects electroplated?
a. Iron objects produce ions in the electrolyte.
b. Iron can rust, and electroplating helps in rusting.
C. Iron can rust, and electroplating prevents it.
d. Iron is a good conductor of electricity.​

Answer 1

Answer:

1. b)

2. c)

3. c)

Explanation:

1. b is correct

because without completing the circuit the ions will not form and hence there will be no electroplating .

2. c is correct

because for electroplating of metal rod the metal sulphate solution is required .with nacl reaction will take place as nacl break into ions but no electroplatibg takes place

3. c is correct

as iron corrides when it come into contact of air and moisture . hence by layering another less reactive metal prevents corossion .hence electroplating prevents rusting of iron.

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