Amongst the following the total number of elements, which produce `H_(2) ` gas with sodium hydroxide is `:`
`Zn,Al,Sn,Pb,P,Si`

Options

A. 3
B. 4
C. 5
D. 6

Answer

C

Explanation

`Zn+2NaOHrarrNa_(2)ZnO_(2)+H_(2)uarr`
`2Al+2NaOH+H_(2)Orarr2NaAlO_(2)+3H_(2)uarr`
`Sn+2NaOH+H_(2)OrarrNa_(2)SnO_(3)+2H_(2)uarr`
`Pb+2NaOH+H_(2)OrarrNa_(2)PbO_(3)+2H_(2)uarr`
`Si+2NaOH+H_(2)O rarr Na_(2)SiO_(3)+2H_(2)uarr`
`P_(4)+3NaOH+3H_(2)O rarr PH_(3)uarr+3NaH_(2)PO_(2)`