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Identify (A), (B), (C ) and (D) and give...

Identify (A), (B), (C ) and (D) and give their formula:
`(A)_((aq))+Zn rarr(B)_((g))`
`(A)_((aq))+(C )overset(Delta)rarr PH_(3)`
`(A)_((aq))+NH_(4)CI rarr (D)_((g))`
Compound (A) imparts golden yellow colour to the Bunsen flame.

Text Solution

Verified by Experts

Compound (A) imparts golden yellow colour to the Bunsen flame, it seems (A) is NaOH.
`underset((A))NaOH_((aq))+Zn rarr Na_(2)ZnO_(2)+underset((B))(H_(2(g)))`
`underset((A))(NaOH_((aq)))+underset("White phosphorous")underset((C ))(P_(4)) overset(Delta)rarr NaH_(2)PO_(2)+PH_(3)`
`underset((A))(NaOH_((aq)))+NH_(4)CI rarr NaCI+underset((D))(NH_(3)uarr) +H_(2)O`
Hence, (A) is sodium `(NaOH)` hydroxide, (B) is hydrogen gas `(H_(2))`, (C ) is white phosphorous `(P_(4))` and (D) is ammonia gas `(NH_(3))`.
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