Alcohol Phenols And Ethers - Organic Chemistry - Chemistry Previous Year Questions

The bromides formed by the cleavage of ethers $A$ and $B$ with HBr respectively are

The major product ' $Y^{\prime}$ in the given sequence of reactions is

$$\mathrm{C}_3 \mathrm{H}_7 \mathrm{OH} \xrightarrow[443 \mathrm{~K}]{\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4} X \xrightarrow[\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO}\right)_2 \mathrm{O}_2]{\mathrm{HBr}} Y$$

Identify the products $R$ and $S$ in the reaction sequence given

$\left(\mathrm{CH}_3\right)_3 \mathrm{COH} \xrightarrow{\mathrm{Na}} P \xrightarrow{\mathrm{CH}_3 \mathrm{Br}} Q \xrightarrow[\Delta]{\mathrm{HI}} R+S$

What is the value of ' $n$ ' in ' $Z$ ' of the following sequence?

Lauryl alcohol $\xrightarrow{\mathrm{H}_{2} \mathrm{SO}_{4}}$

( $X$ )

Lauryl hydrogen sulphate $\xrightarrow{\mathrm{NaOH}(a q)}$

( $Y$ )

$ \mathrm{CH}_{3}-\left(\mathrm{CH}_{2}\right)_{n}-\mathrm{CH}_{2} \mathrm{OSO}_{3} \mathrm{Na} $

(Z)

Sodium lauryl sulphate

Match the following

The correct answer is

Arrange the following in the correct order of their boiling points.

The major product in Reimer-Tiemann reaction is $X$. The reactants are $Y$ and $Z, X, Y$ and $Z$ are respectively

The increasing order of boiling points of the following is

$$\begin{array}{cccc} \mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_3 & \mathrm{CH}_3 \mathrm{CHO} & \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 & \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH} \\ \text { I } & \text { II } & \text { III } & \text { IV } \end{array}$$

$$\begin{aligned} &\text { What is ' } Z \text { ' in the given set of reactions? }\\ &\mathrm{C}_6 \mathrm{H}_5 \mathrm{OCH}_3 \xrightarrow{\mathrm{HI}} X+Y \end{aligned}$$

$$Y \xrightarrow[\text { Anhy. } \mathrm{AlCl}_3]{\mathrm{C}_6 \mathrm{H}_6} \mathrm{Z}$$

The correct statement about the products $B$ and

I. $B$ and $C$ are functional isomers.

II. With $\mathrm{H}_2 /$ Catalyst $B$ gives $1^{\circ}$ amine and $C$ gives $2^{\circ}$ amine.

III. $B$ on acid hydrolysis given formic acid and C gives $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}_2$.

IV. $C$ forms isocyanate with HgO

In which of the following, intramolecular hydrogen bonding is present?

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

$$\text { Isopentane } \xrightarrow{\mathrm{KMnO}_4} X \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4} Y$$

An alochol $X\left(\mathrm{C}_5 \mathrm{H}_{12} \mathrm{O}\right)$ produces turbidity instantly with conc. $\mathrm{HCl} / \mathrm{ZnCl}_2$. Isomer $(Y)$ of $X$ undergoes dehydration with conc. $\mathrm{H}_2 \mathrm{SO}_4$ at $443 \mathrm{~K}, X$ and $Y$ respectively are

$$\text { The ratio of } \sigma \text { bonds to } \pi \text { bonds in } Q \text { is }$$

Assertion (A) : Chlorobenzene is not formed in the reaction of phenol with thionyl chloride.

Reason (R) : In phenol, carbon - oxygen bond has partial double bond character.

The correct answer is :