1
JEE Main 2025 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Aldol condensation is a popular and classical method to prepare $\alpha, \beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?

A
JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 3 English Option 1
B
JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 3 English Option 2
C
JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 3 English Option 3
D
JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 3 English Option 4
2
JEE Main 2025 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An organic compound $(\mathrm{X})$ with molecular formula $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$ is not readily oxidised. On reduction it gives $\mathrm{C}_3 \mathrm{H}_8 \mathrm{O}(\mathrm{Y})$ which reacts with HBr to give a bromide $(\mathrm{Z})$ which is converted to Grignard reagent. This Grignard reagent on reaction with $(\mathrm{X})$ followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds $(\mathrm{X}),(\mathrm{Y})$ and $(\mathrm{Z})$ respectively are:

A
$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br}$
B
$\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$
C
$\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$
D
$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$
3
JEE Main 2025 (Online) 3rd April Evening Shift
MCQ (Single Correct Answer)
+4
-1
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$$ \text {The major product }(\mathrm{P}) \text { in the following reaction is : } $$

JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English
A
JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English Option 1
B
JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English Option 2
C
JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English Option 3
D
JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English Option 4
4
JEE Main 2025 (Online) 3rd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Number of molecules from below which cannot give iodoform reaction is :

Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol.

A
4
B
3
C
5
D
2
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