Idenity (A),(B) and (c )
`A + dii H_(2)SO_(4) rarr ` brown colour vapour turning (KI + statuck )paper blue
`A + NaOH overset(Delta)NH_(3)`gas
`(A) overset(Delta)rarr (B)`(gas) `+(C)` (gas, but liquid aty room temperature)
b. `CO_(2)` and `SO_(2)` both turn line water mily how will you detect the present if turn both are present in a mixture ?
c. `(A),(M_(2) X.7H_(2)O)` has water and `M_(2)X(M` is any divalent anion ) in `1.1` ratio by weight `K_(2)Cr_(2)PO_(3)H^(Theta) ` solution green idenlity (A) unit explain reaction
d. `(A)`,(Black) `+ dil. H_(2)SO_(4) rarr (B ) (gas) + (C )` (light green colour solution ). Gas (B) turns lead actate leat acetre paper black .What are (A) ,(B) and (C ) ?

Explanation

a. `NH_(3)NO_(2) (B ) M_(2) (C ) H_(2)O`
b. Pass the mixture of gases fiurst into acidifect `K_(2)Or_(2)O_(7)` solution them into line water
If line `K_(2)O_(2)O_(3)` solution turn green`- SO_(2)`
If line water turn milk `- CO_(2)`
c. `(A): Na_(2)SO_(3) .7H_(3)O`
d. `(A) Fes (B) H_(2)S (C ) FeSO_(4)`