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2. The formula of lead sulphate is- (b) PbSO4.
3. The colour of zinc metal is- (d) Grey
4. When we place an iron nail in copper sulphate solution, the reddish brown coating formed on the nail is- (c) soft and dull
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2) (b) pbS04
3) (b) silvery
4) (d) hard and flaky
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