Which of the following will not displace hydrogen:
Ba
Sn
Hg
Pb
A
Ba
B
Pb
C
Hg
D
Sn
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Solution
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According to standard electrode, Ba,Pb and Sn have lower reduction potential than H+ so, they can reduce it to H2 but as Hg has higher reduction potential than H+ so, it can not reduce it.
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