Which of the following statements is incorrect

$Cl_2(aq) + H_2S(aq) \to S(s) + 2H^+(aq) + 2Cl^-(aq)$ rate law is $r = K[Cl_2][H_2S]$
then which of these mechanism is/are consistent with this rate law

$(A)\, H_2S \rightleftharpoons H^+ + HS^-$ (fast)

$Cl_2 + HS^-\to 2Cl^-+ H^+ + S$ (slow)

$(B)\, Cl_2 + H_2S \to H^+ + Cl^-+ Cl^+ + HS^-$ (slow)

$Cl^+ + HS^-\to H^+ + Cl^-+ S$ (fast)

→

$\mathop {Z{n_{(s)}}|Z{n^{2 + }}_{(aq)}|}\limits_{{\rm{(anode)}}\,\,\,\,\,\,\,\,\,\,\,\,\,} |\mathop {C{u^{2 + }}_{(aq)}|C{u_{(s)}}}\limits_{{\rm{(cathode)}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} $is

→

A trinitro compound, $1, 3,5$ tris-($4$-nitrophenyl) benzene, on complete reaction with an excess of $\mathrm{Sn} / \mathrm{HCl}$ gives major product, which on treatment with an excess of $NaNO_2 / HCl$ at $0^{\circ} C$ provides $P$ as the product. $P$, upon treatment with excess of $H_2 O$ at room temperature, gives the product $Q$. Bromination of $Q$ in aqueous medium furnishes the product $R$. The compound $P$ upon treatment with an excess of phenol under basic conditions gives the product $S$.

The molar mass difference between compounds $Q$ and $R$ is $474 \mathrm{~mol}^{-1}$ and between compounds $P$ and $S$ is $172.5 \mathrm{~g} \mathrm{~mol}^{-1}$.

($1$)The number of heteroatoms present in one molecule of $R$ is. . . . . .

[Use: Molar mass (in g mol ${ }^{-1}$ ): $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{Br}=80, \mathrm{Cl}=35.5$

Atoms other than $\mathrm{C}$ and $\mathrm{H}$ are considered as heteroatoms]

($2$)The total number of carbon atoms and heteroatoms present in one molecule of $S$. . . . . .

[Use: Molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ ]: $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{Br}=80, \mathrm{Cl}=35.5$

Atoms other than $\mathrm{C}$ and $\mathrm{H}$ are considered as heteroatoms

Give the answer quetion ($1$) and ($2$)

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In the reaction sequence

$CHC{l_3}\xrightarrow{{Air/hv}}x\xrightarrow[{Excess}]{{{C_6}{H_6}\,/\,Anhy\,AlC{l_3}}}y$ , $y$ will be

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Which alky halide has maximum density?