JEE Mains JEE Advance BITSAT
JEE Advance | PYQ

Year

All years 2024 2023 2021

Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. \( \text{NaOH} \) solution, gives P and Q. Compound P does not give Tollens’ test, whereas Q on acidification gives positive Tollens’ test. Treatment of P with excess cyclohexanone in the presence of catalytic amount of p-toluenesulfonic acid (PTSA) gives product R.
Sum of the number of methylene groups (\( -\text{CH}_2- \)) and oxygen atoms in R is ______.

Match the reactions in List-I with the features of their products in List-II and choose the correct option.

The reaction of Q with \( \text{PhSNa} \) yields an organic compound (major product) that gives positive Carius test on treatment with \( \text{Na}_2\text{O}_2 \) followed by addition of \( \text{BaCl}_2 \). The correct option(s) for Q is(are):

List-I contains various reaction sequences and List-II contains the possible products. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.

In the following reaction sequence, the major product P is formed.

Glycerol reacts completely with excess P in the presence of an acid catalyst to form Q. Reaction of Q with excess \( \text{NaOH} \) followed by the treatment with \( \text{CaCl}_{2} \) yields Ca-soap R, quantitatively. Starting with one mole of Q, the amount of R produced in gram is ______.
[Given, atomic weight: \( \text{H} = 1 \), \( \text{C} = 12 \), \( \text{N} = 14 \), \( \text{O} = 16 \), \( \text{Na} = 23 \), \( \text{Cl} = 35 \), \( \text{Ca} = 40 \)]

Reaction of iso-propylbenzene with \( \mathrm{O_2} \) followed by the treatment with \( \mathrm{H_3O^+} \) forms phenol and a by-product \( P \). Reaction of \( P \) with \( 3 \) equivalents of \( \mathrm{Cl_2} \) gives compound \( Q \). Treatment of \( Q \) with \( \mathrm{Ca(OH)_2} \) produces compound \( R \) and calcium salt \( S \).
The correct statement(s) regarding \( P \), \( Q \), \( R \) and \( S \) is(are):

List-I contains various reaction sequences and List-II contains different phenolic compounds. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.

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JEE Advanced 2024 Paper - 1

List-I contains various reaction sequences and List-II contains different phenolic compounds. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.