Aldehyde And Ketone - Organic Chemistry - Chemistry Previous Year Questions

Propyne was subjected to a reaction with $\mathrm{HgSO}_4 /$ dil. $\mathrm{H}_2 \mathrm{SO}_4$, which resulted in a product $P$. The product $P$ was heated with $\mathrm{Ba}(\mathrm{OH})_2$ to give the product $Q$. The molecular formula of the product $Q$ is

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

$$\text { The major product in the following reactions is }$$

Which of the following reactions will give benzophenone as major product?

(A) Benzoyl chloride + benzene $+\mathrm{AlCl}_3$ (anhyd).

(B) Benzoyl chloride + phenylmagnesium bromide

(C) Benzoyl chloride + diphenyl cadmium

154. The major product formed in the following reaction sequence is

     

Which of the following represents Gatterman-Koch reaction?

What is the major product ' $C$ ' in the following sequence of reactions?

In which of the following pairs reactant is correctly matched with reagent that would form benzaldehyde as product?

$$\text { What is } X \text { in the following reaction sequence? }$$

Statement I Aldehyde on reaction with HCN gives cyanohydrin.

Statement II Cyanohydrin is a compound which consists of hydroxy and cyano groups on the same carbon.

Choose the correct answer from the following with reference to above statements.

The product( $s$ ) formed when $m$-chlorobenzaldehyde is heated with concentrated NaOH is/are

The main reactants involved in Etard reaction are

Conversion of $X$ into $Y$ is an example of the reaction

Arrange the following in the correct order of their reactivity towards nucleophilic addition reactions.

Consider the following sequence of reactions,

$$\mathrm{C}_2 \mathrm{H}_4 \xrightarrow[\text { (ii) } \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3} P \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}]{\text {(i) } \mathrm{CH}_3 \mathrm{MgBr} / \text { Ether }} Q \xrightarrow[\mathrm{CH}_2 \mathrm{Cl}_2]{\mathrm{PCC}} R$$

The incorrect statement about $R$ is

$$\text { What is } B \text { in the given reaction? }$$

$$\text { Identify } X \text { and } Y \text { in the reactions, given below }$$

A primary alcohol was reacted with pyridinium chlorochromate (PCC), which resulted in a product $P$. The product $P$ on treatment with ammonical silver nitrate solution produces

Benzene on reaction with acetyl chloride in the presence of anhydrous $\mathrm{AlCl}_3$ gave the product $P$. The product $P$ on reaction with methylmagnesium bromide followed by treatment with water furnished the product $Q$. The molecular formula of $Q$ is