1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is/are the product/s formed when Benzaldehyde and Ethanal react in presence of dil. $$\mathrm{NaOH}$$ followed by heating the intermediate product formed?

A
2-Methylpent-2-enal & But-2-enal
B
3-Phenylprop-2-enal & But-2-enal
C
Only product is But-2-enal
D
Only product is 2-Phenylprop-2-enal
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following is the correct order of reagents to be used to convent [A] to [X] ?

COMEDK 2024 Evening Shift Chemistry - Aldehyde and Ketone Question 1 English

$$ \text { Reagents: } \mathrm{PCC}, \mathrm{PCl}_5, \mathrm{LiAlH}_4, \frac{\mathrm{KCN}}{\mathrm{H}_3 \mathrm{O}^{+}} $$

A
$$ \frac{K C N}{H_3 \mathrm{O}^{+}} \quad \mathrm{PCl}_5 \quad \mathrm{PCC} \quad \mathrm{LiAlH}_4 $$
B
$$ \mathrm{PCl}_5, \quad \frac{K C N}{H_3 \mathrm{O}^{+}} \quad \mathrm{LiAlH}_4 \quad \mathrm{PCC} $$
C
$$ \mathrm{LiAlH}_4, \frac{K C N}{H_3 \mathrm{O}^{+}} \quad \mathrm{PCl}_5 \quad \mathrm{PCC} $$
D
$$ \mathrm{PCC} \quad \mathrm{PCl}_5 \quad \frac{K C N}{\mathrm{H}_3 \mathrm{O}^{+}} \quad \mathrm{LiAlH}_4 $$
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Product of the following reaction is

COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 10 English

A
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 10 English Option 1
B
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 10 English Option 2
C
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 10 English Option 3
D
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 10 English Option 4
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Acetophenone when reacted with a base, $$\mathrm{C}_2 \mathrm{H}_5 \mathrm{ONa}$$, yields a stable compound which has the structure

A
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 11 English Option 1
B
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 11 English Option 2
C
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 11 English Option 3
D
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 11 English Option 4
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