STD 11 - 8.4. Organic chemistry reaction mechanism — NEET STD 11 Science — Question

Incorrect statement for $Q$ is

takes places through the mechanism given below :

$NO + Br _2 \Leftrightarrow NOBr _2 \text { (fast) }$

$NOBr _2+ NO \rightarrow 2 NOBr \text { (slow) }$

The overall order of the reaction is $.....$.

$(1)$ Reaction of gold with aqua regia produces $NO _2$ in the absence of air

$(2)$ Aqua regia is prepared by mixing conc. $HCl$ and conc. $HNO _3$ in $3: 1$ ($v/v$) ratio

$(3)$ Reaction of gold with aqua regia produces an anion having $Au$ in +$3$ oxidation state

$(4)$ The yellow colour of aqua regia is due to the presence of $NOCl$ and $Cl _2$