The pair of metals which will produce hydrogen gas in reaction with acid is:
Mg, Cu
Mg, Ag
Cu, Zn
Zn, Pb
A
Mg, Cu
B
Zn, Pb
C
Cu, Zn
D
Mg, Ag
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Solution
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The pair of metals which will produce hydrogen gas in reaction with acid is zinc and lead i.e. Zn, Pb
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