Find the number of metals which are commercially reduced by self-reduction from the given metals : `Fe, Al, Z, Sn, Pb, Hg, Cu`.

Find the number of metals which are commercially reduced by self-reduc

1.	Find the number of metals which are commercially reduced by self-reduction from the given metals : `Fe, Al, Z, Sn, Pb, Hg, Cu`.
Answer» Correct Answer - 4 Fe ,Cr , Ni and Al become passive when dipped in conc. `HNO_(3)`

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Find the number of metals which are commercially reduced by self-reduction from the given metals : `Fe, Al, Z, Sn, Pb, Hg, Cu`.

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