Lead has been placed in qualitative group analysis 1st and 2nd because:

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It shows the valency one and two

It forms insoluble PbCl2

It forms lead sulphide

PbCl2 is partially soluble in water

answer is D.

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Detailed Solution

Pb forms PbCl2 in group I and PbS in group II. Lead salts are partially soluble in water.

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