Question

Consider the following statements and arrange in the order of true/false as given in the codes.

$S_1:N_{2}O$ with sodium metal in liquid ammonia forms sodium azide and nitrogen gas is liberated.

$S_2$: Ammonium dichromate on heating decomposes to give nitrogen and a green coloured compound.

$S_3$: $CaNCN$ on hydrolysis produces a white precipitate and a gas which turns filter paper moistened with copper sulphate solution deep blue.

• A. $TTT$
• B. $TFT$
• C. $FFT$
• D. $FTT$

Answer 1

The correct option is A $TTT$

$S_1.$ $3N_{2}O+4Na+N{H}_3\stackrel{N{H}_3\left(l\right)}{\to }\underset{SodiumAzide}{Na{N}_3}+3NaOH+2N_2$

$S_2.$ $(N{H}_4{)}_{2}C{r}_2{O}_7\stackrel{\Delta }{\to }{N}_2+4H_{2}O+\underset{green}{C{r}_2{O}_3\downarrow }$

$S_3.$ $CaC{N}_2+3H_{2}O\to \underset{White}{CaC{O}_3\downarrow }+2N{H}_3$

$C{u}^{2+}+4N{H}_3\to \left[Cu\right(N{H}_3{)}_4{]}^{2+}$ $\left(deepblue\right)$.