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

It shows the valency one and two

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It forms insoluble

P b C l_{2}

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It forms lead sulphide

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P b C l_{2}

is partially soluble in water

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Solution

The correct option is D $P b C l_{2}$ is partially soluble in water
Option (D) is correct.
Lead has been placed in qualitative group analysis 1st and 2nd because $P b C l_{2}$ is partially soluble in water.
$P b$ forms $P b C l_{2}$ in I group and $P b S$ in II group. Lead salts are partially soluble in water.

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