Hydrocarbons — JEE Advanced PYQs

In the following reaction sequence Q, R, S and T are the major products.
The correct statement(s) about $\mathbf{Q},\mathbf{R},\mathbf{S}$ and $\mathbf{T}$ is (are)

Treatment of buta-1,3-diyne with ${\mathrm{NaNH}}_2$ (2 equivalents), followed by reaction with excess of trans- ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{Br}$ gives X as the major product. The maximum number of carbon atoms that are collinear (in a str …

The List-II contains products obtained from the reaction of compounds in List-I with ${\mathrm{O}}_3/\mathrm{Zn}-{\mathrm{H}}_2\mathrm{O}$ followed by cyclization (via more stable enolate) in the presence of aqueous NaOH. Match each entry in List-I with appropriate entry in …

Consider the depicted hydrogen (H) in the hydrocarbons given below. The most acidic hydrogen (H) is

For the reaction sequence given below, the correct statement(s) is(are)

In the following reactions, P, Q, R, and S are the major products.

(see structures for reaction schemes)

The correct statement about $\mathbf{P},\mathbf{Q},\mathbf{R}$, and $\mathbf{S}$ is

The reaction of 4-methyloct-ene (P, 2.52 g) with HBr in the presence of ${\left({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CO}\right)}_2{\mathrm{O}}_2$ gives two isomeric bromides in a 9 : 1 ratio, with combined yield of $50\%$. Of these, the entire amount of the primary alkyl b …

The total number of chiral molecules formed from one molecule of P on complete ozonolysis ( ${\mathrm{O}}_3,\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}$ ) is ____.

The maximum number of possible isomers (including stereoisomers) which may be formed on mono-bromination of 1-methylcyclohex-1-ene using ${\mathrm{Br}}_2$ and UV light is ____

The reaction sequence(s) that would lead to $o$-xylene as the major product is (are)

Consider the following transformations of a compound $\mathbf{P}$.

Choose the correct option(s).

Which of the following reactions produce(s) propane as a major product?

Choose the correct option(s) that give(s) an aromatic compound as the major product.

The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is (are)

Treatment of benzene with CO/HCl in the presence of anhydrous ${\mathrm{AlCl}}_3/\mathrm{CuCl}$ followed by reaction with ${\mathrm{Ac}}_2\mathrm{O}/\mathrm{NaOAc}$ gives compound $\mathbf{X}$ as the major product. Compound $\mathbf{X}$ upon reaction with …

Treatment of benzene with CO/HCl in the presence of anhydrous ${\mathrm{AlCl}}_3/\mathrm{CuCl}$ followed by reaction with ${\mathrm{Ac}}_2\mathrm{O}/\mathrm{NaOAc}$ gives compound $\mathbf{X}$ as the major product. Compound $\mathbf{X}$ upon reaction with …

The correct statement(s) for the following addition reactions is(are)

(i)

(ii)

Among the following, the number of aromatic compound(s) is

| (III) Benzaldehyde | (iii) …

In the following monobromination reaction, the number of possible chiral products is

(see structure)

(1.0 mole)
(enantiomerically pure)

Among the following, reaction(s) which gives(give) tert-butyl benzene as the major product is(are)

In the following reaction, the major product is

The reactivity of compound Z with different halogens under appropriate conditions is given below:

The observed pattern of electrophilic substitution can be explained by

Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both the schemes.

1. ${\mathrm{NaNH}}_2$ (excess)

1. ${\mathrm{NaNH}}_2$ (2 equivalent)

The product X is

Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both the schemes.

1. ${\mathrm{NaNH}}_2$ (excess)

1. ${\mathrm{NaNH}}_2$ (2 equivalent)

The correct statement with respect to product Y is

Match the four starting materials (P, Q, R, S) given in List I with the corresponding reaction schemes (I, II, III, IV) provided in List II and select the correct answer using the code given below the lists.

List-I

P. (see structure)

Q. (see structure)

R. (see structure)

S. …

The major product(s) of the following reaction is(are)

Match the chemical conversions in List I with the appropriate reagents in List II and select the correct answer using the code given below the lists:
| 3. | Et-B …

In the following reaction sequence, the compound J is an intermediate. …

The number of optically active products obtained from the complete ozonolysis of the given compound is

An acyclic hydrocarbon $\mathbf{P}$, having molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{10}$, gave acetone as the only organic product through the following sequence of reactions, in which $\mathbf{Q}$ is an intermediate organic compound.

The structure of the compound …

The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are

In the reaction

The compounds P, Q and S

Q

s

were separately subjected to nitration using ${\mathrm{HNO}}_3/{\mathrm{H}}_2{\mathrm{SO}}_4$ mixture. The major product formed in each case respectively, is

A tertiary alcohol $\mathbf{H}$ upon acid catalysed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound $\mathbf{L}$, whereas $\mathbf{K}$ on reaction with KOH gives only …

The number of stereoisomers obtained by bromination of trans-2-butene is

The major products P and Q are