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JEE Advanced 2024 Paper 1 Online
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Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. $\mathrm{NaOH}$ solution, gives $\mathbf{P}$ and $\mathbf{Q}$. Compound $\mathbf{P}$ does not give Tollens' test, whereas $\mathbf{Q}$ on acidification gives positive Tollens' test. Treatment of $\mathbf{P}$ with excess cyclohexanone in the presence of catalytic amount of $p$-toluenesulfonic acid (PTSA) gives product $\mathbf{R}$.

Sum of the number of methylene groups $\left(-\mathrm{CH}_2-\right)$ and oxygen atoms in $\mathbf{R}$ is __________.

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JEE Advanced 2021 Paper 1 Online
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In the reaction given below, the total number of atoms having sp2 hybridization in the major product P is _________.

JEE Advanced 2021 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 45 English
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3
JEE Advanced 2020 Paper 1 Offline
Numerical
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In the following reaction, compound Q is obtained from compound P via an ionic intermediate

JEE Advanced 2020 Paper 1 Offline Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 47 English

What is the degree of unsaturation of Q?
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4
JEE Advanced 2018 Paper 2 Offline
Numerical
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In the following reaction sequence, the amount of $$D$$ (in g) formed from $$10$$ moles of acetophenone is ___________.

(Atomic weights in $$g\,mo{l^{ - 1}}:H = 1,C = 12,$$ $$N = 14,O = 16,$$ $$Br = 80.$$. The yield (%) corresponding to the product in each step is given in the parenthesis)

JEE Advanced 2018 Paper 2 Offline Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 60 English
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