Which one of the following metals cannot evolve `H_(2)` from acids or `H_(2)O` or from its compoundA. HgB. AlC. PbD. Fe

Which one of the following metals cannot evolve `H_(2)` from acids or

1.	Which one of the following metals cannot evolve `H_(2)` from acids or `H_(2)O` or from its compoundA. HgB. AlC. PbD. Fe
Answer» Correct Answer - A Hg has greater reduction potential than that of `H^(+)` and hence cannot displace hydrogen from acid.

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Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^(-)`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^-`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
What are elementary reactions ?

Which one of the following metals cannot evolve `H_(2)` from acids or `H_(2)O` or from its compoundA. HgB. AlC. PbD. Fe

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