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Tin contains only 5 - 10 % of tin as SnO...

Tin contains only 5 - 10 % of tin as `SnO_(2)`, the rest being Siliceous matter, wolfram and pyrites of iron copper and arsenic. It is not attached by water. Only molten tin reacts with steam liberating hydrogen. In stannous oxide, tin is +2 oxidising state. So stannous oxide is also described as tin (II) oxide
Tin is attacked by

A

Hot KOH

B

Hot HCl

C

Conc. `HNO_(3)`

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
`Sn+2KOH+H_(2)OtoK_(2)SnO_(3)+2H_(2)`
`Sn+2HCl toSnCl_(2)+H_(2)`
`4Sn+4HNO_(3)toH_(2)SnO_(3)+4NO_(2)+H_(2)O`
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