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Which of the following dissolves in hot ...

Which of the following dissolves in hot concentrated NaOH solution?

A

Fe

B

Zn

C

Sn

D

Ag

Text Solution

Verified by Experts

The correct Answer is:
B, C
Zn dissolve in Conc. NaOH due to the formation of sodium Zincate.
`Zn+2NaOHrarr Na_(2)ZnO_(2)+H_(2)`
Sn also dissolve to form stannate
`Sn+2NaOH+4H_(2)Orarr underset("Sodium stannate")(Na_(2)[Sn(OH)_(6)]+2H_(2))`
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