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

Identify the Reagents I and II to be used in the course of the given reactions.

COMEDK 2024 Morning Shift Chemistry - Aldehyde and Ketone Question 11 English

A
$$ \text { Reagent I: DIBAL- } \mathrm{H} / \mathrm{H}_2 \mathrm{O} \quad \text { Reagent II: conc. } \mathrm{KOH} / \text { heat } $$
B
$$ \text { Reagent I: } \mathrm{Zn} / \mathrm{Hg} \text { in conc. } \mathrm{HCl} \quad \text { Reagent II: }\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+} $$
C
$$ \text { Reagent I: } \mathrm{NH}_2 \mathrm{NH}_2 / \mathrm{KOH} \quad \text { Reagent II: } \mathrm{Cr}_2 \mathrm{O}_7{ }^{2-} / \mathrm{H}^{+} $$
D
$$ \text { Reagent I: } \mathrm{H}_2 / \mathrm{Pd}-\mathrm{BaSO}_4 \quad \text { Reagent II: } \mathrm{CrO}_3 /\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 $$
2
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 19 English

A
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 19 English Option 1
B
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 19 English Option 2
C
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 19 English Option 3
D
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 19 English Option 4
3
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 20 English Option 1
B
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 20 English Option 2
C
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 20 English Option 3
D
COMEDK 2023 Morning Shift Chemistry - Aldehyde and Ketone Question 20 English Option 4
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is incorrect?

A
Primary alcohols are very easily oxidised to aldehydes, which are oxidised to acids with same number of C-atoms.
B
Secondary alcohols are very easily oxidised to ketones, which are oxidised to acids with same number of C-atoms.
C
Secondary alcohols are easily oxidised to ketones, which are oxidised to acids with lesser number of $$\mathrm{C}$$-atoms.
D
Secondary and tertiary alcohols on oxidation form acids with lesser number of C-atoms.
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