Question

On mild acidification of nitrate ion we get nitric acid which upon heating at 303K gives a compound $A$ which on further heating at 313K gives $B$, now which of following propeties confirms $B$?

• A. It is brown in colour.
• B. $Cu$ turnings intensifies its colour.
• C. It is yellow coloured.
• D. none of the above

Answer 1

Answer: (A), (B)

The correct options are
A It is brown in colour.
B $Cu$ turnings intensifies its colour.

$N{O}_3^{\ominus }\underset{MildAcidification}{\overset{H^{\oplus }HN{O}_3}{\to }}$

$4HN{O}_3\underset{303K}{\overset{\Delta }{\to }}2H_{2}O+4NO+3O_2$

$2NO+O_2\underset{313}{\overset{k}{\to }}2N{O}_2$