Question

$( X ) \xrightarrow{ KOH }( Y )$ (gas turns red litmus blue) $+( Z )$
$\xrightarrow{ Zn + KOH }( Y )(\text{ gas} ) .(X) \xrightarrow{\Delta}$ gas (does not support combustion)
Identify $(X)$ to $(Z)$ :

• A. ${X}={NH}_{4}{NO}_{2} {Y}={NH}_{3} {Z}={KNO}_{2}$
• B. ​​ ${X}=(NH)_{4})_{2}(Cr)_{2}(O)_{7} {Y}=(NH)_{3} {Z}=(Cr)_{2}(O)_{3}$
• C. $X=(NH_{4})_{2}(SO)_{4} {Y}=(NH)_{3} {Z}=(K)_{2}(SO)_{4}$
• D. ${X}={NH}_{4}{NO}_{3} {Y}={NH}_{3} {Z}={KNO}_{3}$

Answer 1

Answer: (A)

$\underset{(X)}{(NH)_4(NO)_2} + KOH \rightarrow \underset{(Y)}{(NH)_3}\uparrow + \underset{(Z)}{(KNO)_2} + (H)_2O$
$\underset{(Z)}{NO_2^-} + 3Zn + 5(OH)^- + 5(H)_2O \rightarrow \underset{\text{soluble}}{3([Zn(OH)_4])^{2-}} + \underset{(Y)}{(NH)_3}\uparrow$