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Zinc on reaction with NaOH gives a salt ...

Zinc on reaction with NaOH gives a salt (A) along with a gas (X) and (A) on reaction with a gas (Y) gives white precipitate (W). Which of the following is correct? `(A) is Na_4ZnO_3,(Y) is H_2 S`; `(X) is H_2,(W) is Zn(OH)_2`; `(A) is Na_2ZnO_2,(X) is O_2`; `(W) is ZnS,(X) is H_2`

A

`(A) is Na_4ZnO_3,(Y) is H_2 S`

B

`(X) is H_2,(W) is Zn(OH)_2`

C

`(A) is Na_2ZnO_2,(X) is O_2`

D

`(W) is ZnS,(X) is H_2`

Text Solution

Verified by Experts

The correct Answer is:
D
`Zn + 2NaOH rarr underset((A))(Na_2ZnO_2) + underset((x))(H_2)`
`Na_(2)ZnO_(2) + underset((Y))(H_2S) rarr underset((W))(ZnS)+2NaOH`
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