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Q.

'Softening of lead' means:

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a

Conversion of lead to PbO.

b

Conversion of lead to Pb3O4.

c

Removal of impurities (metallic) from lead.

d

Washing lead with HNO3 followed by a dilute alkali solution.

answer is C.

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Detailed Solution

The removal of metallic impurities from lead is known as 'Softening of lead'.
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