$$ \text { Identify the compounds } \mathrm{A} \text { and } \mathrm{B} \text { from the following reaction sequence: } $$





The reagent used in carbylamine reaction is $\_\_\_\_$ and the product of the reaction will be $\_\_\_\_$
Alcoholic $\mathrm{KOH}+\mathrm{CHCl}_3$; isocyanide
Benzene sulphonyl chloride ; sulphonamide
Alcoholic $\mathrm{KOH}+\mathrm{CHCl}_3$; cyanide
Concentrated $\mathrm{HCl}+\mathrm{NaNO}_2$; diazonium salt
Two statements, Assertion and Reason are given. With reference to them, choose the correct option.
Assertion: Hydrolysis of 2-Bromo-2-methylpropane follows $S_N 1$ mechanism which involves 2 steps and the first step is:
Reason: The energy required to cleave $\mathrm{C}-\mathrm{Br}$ is taken from the energy released due to Inductive effect and hyper-conjugative effect.
Assertion is correct but Reason is wrong
Reason is correct but Assertion is wrong
Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion
The heat of combustion of carbon to $\mathrm{CO}_2$ is $-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
The heat released on the formation of 35.2 g of $\mathrm{CO}_2$ by combustion of C is:
+215 kJ
-315 kJ
-325 kJ
+620 kJ
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