Which of the following metals cannot displace hydrogen grom nonoxidizing acids ?
`Pb` (ii) `Sn`
(iii) `Ni`
(iv) `Zn`.

Options

A. (i), (ii), (iii)
B. (ii), (iii), (iv)
C. (i), (ii), (iii) (iv)
D. (i), (ii)

Answer

C

Explanation

Many metals like Pb, Sn,Ni, Co, and `Cd` which do not react with water are capable of displacing hydrogen from non oxidizing acids :
` Cd(s) + 2HCl(aq.) rarr CdCl_2(aq.) + H_2 (g)`
`Sn(s) + 2HCl(aq.) rarr SnCl_2(aq.) + H_2(g)`
These metals lie above H in the activity series.