Preparation of Aldehydes and Ketones

Reagent (x) is

Which of the following on heating with aqueous KOH, produces acetaldehyde?

$1-$methylcyclohexa$-1, 3-$diene on reductive ozonolysis with $\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}$ yields products A and B.The total number of ${\mathrm{sp}}^2$hybridized carbons in A and B are

Which of the following is not synthesized by Rosenmund reduction:

Ethyl methyl ketone is obtained by heating calcium salts of

The Grignard's reagent used to convert Benzonitrile to acetophenone (benzophenone) is:

In the following reaction, $\mathrm{P}$ gives two products $\mathrm{Q}$ and $\mathrm{R}$ each in $40\%$ yield.

If the reaction is carried out with $420 \mathrm{mg}$ of $\mathrm{P}$, the reaction yields $108.8 \mathrm{mg}$ of $\mathrm{Q}$. The amount of $\mathrm{R}$ produced in the reaction is closest to

The major product of the following reaction. 

 is

The name of organic compound ${\mathrm{C}}_4{\mathrm{H}}_6$ that produces carbon dioxide, ethanal and methanal upon treatment with ${\mathrm{O}}_3$ followed by reduction with $\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}$ is:

The major product(s) in the following reactions is/are

What are $\mathrm{X}$ and $\mathrm{Y}$ in the following reaction sequence?

Matching the following:

	Reaction conditions		Name of the reaction
a		$\mathrm{i}$	Gatterman-Koch
b		$\mathrm{ii}$	Etard
c		$\mathrm{iii}$	Rosenmund

The products $\mathrm{P}$ and $\mathrm{Q}$ of the following reactions, respectively are:

$\mathrm{X}$ and $\mathrm{Y}$ are respectively :

$\mathrm{X}=$ A number of reactions in which the final product is an aldehyde. Find out $\mathrm{X}$.

$\left(\mathrm{a}\right) \mathrm{Ph}-\mathrm{C}\equiv \mathrm{N}\frac{\left(\mathrm{i}\right){\mathrm{SnCl}}_2+\mathrm{HCl}}{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}$

$\left(\mathrm{b}\right) \mathrm{Ph}-\mathrm{C}\equiv \mathrm{N}\stackrel{{\mathrm{LiAIH}}_4}{\to }$

$\left(\mathrm{c}\right) \mathrm{Ph}-\mathrm{COCl}\stackrel{{\mathrm{H}}_2/\mathrm{Pd}-{\mathrm{BaSO}}_4}{\to }$

$\left(\mathrm{d}\right) \mathrm{Ph}-\mathrm{COOEt}\underset{\mathrm{ii}) {\mathrm{H}}_2\mathrm{O}}{\overset{\mathrm{i}) \mathrm{DiBAL}-\mathrm{H}, \mathrm{Hexane}, -{78}^{°}\mathrm{C}}{\to }}$

Periodic oxidation of $1$, $2-$cyclopentanediol is :

${\mathrm{H}}_2\mathrm{COH}.{\mathrm{CH}}_2\mathrm{OH}$ on heating with periodic acid gives :-

Identify $\mathrm{C}$ :-

In this reaction intermediate is :-