p -Block elements - ll — Chemistry STD 12 Science — Question

$1.$ $P$ and $Q$, respectively, are the sodium salts of

$(A)$ hypochlorus and chloric acids

$(B)$ hypochlorus and chlorus acids

$(C)$ chloric and perchloric acids

$(D)$ chloric and hypochlorus acids

$2.$ $R , S$ and $T$, respectively, are

$(A)$ $SO _2 Cl _2, PCl _5$ and $H _3 PO _4$

$(B)$ $SO _2 Cl _2, PCl _3$ and $H _3 PO _3$

$(C)$ $SOCl _2, PCl _3$ and $H _3 PO _2$

$(D)$ $SOCl _2, PCl _5$ and $H _3 PO _4$

Give the answer question $1$ and $2.$

$(1)$ 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 $Cl _2$