Rohit has performed an activity to test whether the following materials conduct electricity or not by putting them in the circuit, one at a time as shown in the figure.
I) Aluminium foil II) A piece of stone III) Copper wire IV) Graphite
V) Sulphur VI) Silver coin
For this, he made up an experimental set up and got the following results.
The substances P and Q shown in the given set up are

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P – I, III, IV, VI Q – II, V

P – II, IV, V Q – I, III, IV

P – II, VI ,V Q – I, III, IV

P – I, II, III Q – IV, V, VI

answer is D.

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Detailed Solution

Graphite is an allotrophic form of carbon, which can conduct electricity. Aluminimum foil, copper wire, graphite, silver coin and a piece of stone and sulphur do not conduct electricity

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