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1
JEE Main 2021 (Online) 24th February Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO4 and H2SO4?
A
JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 98 English Option 1
B
JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 98 English Option 2
C
JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 98 English Option 3
D
JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 98 English Option 4
2
JEE Main 2021 (Online) 24th February Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Match List - I and List - II.

List-I List-II
(a) JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 99 English 1 (i) $$\mathrm{Br}_{2} / \mathrm{NaOH}$$
(b) JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 99 English 2 (ii) $$\mathrm{H}_{2} / \mathrm{Pd}-\mathrm{BaSO}_{4}$$
(c) JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 99 English 3 (iii) $$\mathrm{Zn}(\mathrm{Hg}) / \mathrm{H}$$ Conc. $$\mathrm{HCl}$$
(d) JEE Main 2021 (Online) 24th February Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 99 English 4 (iv) $$\mathrm{Cl}_{2}$$ Red $$\mathrm{P}, \mathrm{H}_{2} \mathrm{O}$$


Choose the correct answer from the options given below :
A
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
B
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
3
JEE Main 2021 (Online) 24th February Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following reagent is used for the following reaction ?

$$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 \stackrel{?}{\longrightarrow} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO} $$
A
Molybdenum oxide
B
Manganese acetate
C
Copper at high temperature and pressure
D
Potassium permanganate
4
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is :

Item-I Item-II
(I) Benzene (P) HCl and SnCl2, H3O+
(II) Benzonitrile (Q) H2, Pd-BaSO4, S and quinoline
(III) Benzoyl Chloride (R) CO, HCl and AlCl3
A
(I) - (R), (II) - (P) and (III) - (Q)
B
(I) - (P), (II) - (Q) and (III) - (R)
C
(I) - (Q), (II) - (R) and (III) - (P)
D
(I) - (R), (II) - (Q) and (III) - (P)
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