The negative ligand is

Experiment No.	$\begin{array}{c}{[ A ]} \\ \left( mol dm ^{-3}\right)\end{array}$	$\begin{array}{c}{[ B ]} \\ \left( mol dm ^{-3}\right)\end{array}$	$\begin{array}{c}{[ C]} \\ \left( mol dm ^{-3}\right)\end{array}$	Rate of reaction $\left( mol dm ^{-3} s ^{-1}\right)$
$1$	$0.2$	$0.1$	$0.1$	$6.0 \times 10^{-5}$
$2$	$0.2$	$0.2$	$0.1$	$6.0 \times 10^{-5}$
$3$	$0.2$	$0.1$	$0.2$	$1.2 \times 10^{-4}$
$4$	$0.3$	$0.1$	$0.1$	$9.0 \times 10^{-5}$

The rate of the reaction for $[ A ]=0.15 mol dm ^{-3},[ B ]=0.25 mol dm ^{-3}$ and $[ C ]=0.15 mol dm ^{-3}$ is found to be $Y \times 10^{-5} mol dm d ^{-3} s ^{-1}$. The value of $Y$ i. . . . . . .

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Enthalpy of formation of $HF$ and $HCl$ are $ - \,161\,kJ$ and $ - \,92\,kJ$ respectively. Which of the following statements is incorrect

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Given below are two statements

Statement $-I :$ Retardation factor $\left( R _{ f }\right)$ can be measured in meter/centimeter.

Statement $-II :$ $R _{ f }$ value of a compound remains constant in all solvents.

Choose the most appropriate answer from the options given below

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Cis-trans-isomerism is found in square planar complexes of the molecular formula : ($A$ and $B$ are monodenate ligands) :

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Amongst the given options, the compound$(s)$ in which all the atoms are in one plane in all the possible conformations (if any), is (are) $Image$