Addition of water to alkynes occurs in acidic medium and in the presence of Hg2+ ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions?

1.
2.
3.
4.
Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The reagent which does not react with both, acetone and benzaldehyde?

1. Sodium hydrogen sulphite   

2. Phenyl hydrazine

3. Fehling's solution                 

4. Grignard reagent

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch


The structure of ‘A’ and the type of isomerism with the final product
in the above reaction are respectively: 

1. Prop-1-en-2-ol and Metamerism
2. Prop-1-en-1-ol and Tautomerism
3. Prop-2-en-2-ol and Geometrical isomerism
4. Prop-1-en-2-ol and Tautomerism

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Compounds A and C in the following reaction are:

\(\mathrm{\small{{CH}_3 {CHO} \xrightarrow[{(ii) ~H_{2}O}]{(i) ~CH_{3}MgBr}({A}) \stackrel{{H}_2 {SO}_4}{\longrightarrow}({B}) \xrightarrow[]{Hydroboration \ oxidation}(C)}}\)

1.  Identical                               

2.  Positional isomers

3.  Functional isomers       

4.  Optical isomers

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which of the following compounds will give butanone on oxidation with alkaline KMnO4

solution?

1.  Butan-1-o1                 
2. Butan-2-ol
3.  Both (a) and (b)             
4.  None of the above

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Benzophenone can be obtained by .......... .
a.  Benzoyl chloride + benzene 
b.  Benzoyl chloride + diphenyl cadmium
c.  Benzoyl chloride + phenyl magnesium chloride
d.  Benzene + carbon monoxide 

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Match the common names given in Column I with the IUPAC names given in Column II.

Column l 
(Common names)
Column ll
(IUPAC names)
A. Cinnamaldehyde 1. Pentanal 
B. Acetophenone 2. Prop-2-enal
C. Valeraldehyde 3. 1-phenylethanone
D. Acrolein 4. 3-Phenylprop-2-en-al

Codes

A B C D
1. 2 3 4 1
2. 3 1 4 2
3. 1 4 3 2
4. 4 3 1 2
Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Match the reactions given in Column I with the suitable reagents given in Column II. 

Column l
(Reactions)
Column ll
(Reagents)
A. Benzophenone → Diphenylmethane 1. LiAlH4
B. Benzaldehyde → 1-Phenylethanol 2. DlBAL-H
C. Cyclohexanone → Cyclohexanol 3. Zn(Hg)/Conc.HCl
D. Phenyl benzoate → Benzaldehyde  4. CH3MgBr

Codes

  A  B D
1.   2  3   4 1
2.   3   4     1  2
3.   1  4   3  2
4.   4   3   2  1

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch