Toluene on treatment with chromic oxide in acetic anhydride at $273 \mathrm{K}$ to $283 \mathrm{K}$ gives

The product "$\mathrm{P}$" in the above reaction is :

The major product of the following reaction is:

List-I (Salt)		List-II (Flame colour wavelength)
(a)		(i)	${\mathrm{Br}}_2/\mathrm{NaOH}$
(b)		(ii)	${\mathrm{H}}_2/\mathrm{Pd}-{\mathrm{BaSO}}_4$
(c)		(iii)	$\mathrm{Zn}\left(\mathrm{Hg}\right)/\mathrm{Conc}.\mathrm{HCl}$
(d)		(iv)	${\mathrm{Cl}}_2/\mathrm{Red} \mathrm{P}, {\mathrm{H}}_2\mathrm{O}$

Choose the correct answer from the options given below:

What are $\mathrm{X}$ and $\mathrm{Y}$, respectively, in the following reactions?

$\underset{\left({\mathrm{C}}_4{\mathrm{H}}_8{\mathrm{Cl}}_2\right)}{\mathrm{A}}\underset{373 \mathrm{K}}{\overset{\mathrm{Hydrolysis}}{\to }}\underset{\left({\mathrm{C}}_4{\mathrm{H}}_8\mathrm{O}\right)}{\mathrm{B}}$

$\mathrm{B}$ reacts with Hydroxyl amine but does not give Tollen's test. Identify $\mathrm{A}$ and $\mathrm{B}$.

The major product of the following reaction sequence is $\underline{ }$ 

The major product of the following reaction. 

 is

In the following reaction

The compound $\mathrm{Z}$ is

The intermediate compound $\text{'}\mathrm{X}\text{'}$ in the following chemical reaction is:

The major product of the following reaction sequence is

In the reaction,

$\mathrm{X}$ and $\mathrm{Y}$ are :

In the following reaction,

$\mathrm{X}$ and $\mathrm{Y}$ are :

${\mathrm{CH}}_3-\mathrm{CN}\stackrel{\mathrm{Na}/{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{⟶}\mathrm{A}\stackrel{{\mathrm{HNO}}_2}{⟶}\mathrm{B}\frac{\mathrm{Cu}}{573\mathrm{k}}\mathrm{C}$

Here $\mathrm{C}$ is