An appropriate method for molecular weight determination of chlor…

	list $I$		list $II$
$A.$	Butane $\to $ Isobutane	$(a)$	Cracking
$B.$	Butane $\to $ Lower hydrocarbons	$(b)$	Isomerisation
$C.$	$n-$ Heptane $\to $ Toluene	$(c)$	Reed reaction
$D.$	Propane $\to CH_3CH_2CH_2SO_2Cl$	$(d)$	Aromatization

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Match List $I$ with List $II$:

List $I$ (Mixture)	List $II$ (Separation Technique)
$A$ $CHCl _3+ C _6 H _5 NH _2$	$I$ Steam distillation
$B$ $C _6 H _{14}+ C _5 H _{12}$	$II$ Differential extraction
$C$ $C _6 H _5 NH _2+ H _2 O$	$III$ Distillation
$D$ Organic compound in $H _2 O$	$IV$ Fractional distillation

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Given below are two statements:

Statement $(I)$ : A $\pi$ bonding $MO$has lower electron density above and below the inter-nuclear asix.

Statement $(II)$ : The $\pi^*$ antibonding $MO$ has a node between the nucles.In the light of the above statements, choose the most appropriate answer from the options given below:

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In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because

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The enthalpy change $(\Delta H)$ for the reaction, $N_2 (g) + 3H_2 (g) \to 2NH_3(g)$ is $-92.38\, kJ$ at $298\, K$. The internal energy change $\Delta U$ at $298\, K$ is .............. $\mathrm{kJ}$

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The major product $( P )$ in the reaction

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$\left[ Ph\right.$ is $\left.- C _{6} H _{5}\right]$ is ....