1
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Amongst the following, the linear species is :
A
O3
B
Cl2O
C
N$$_3^ - $$
D
NO2
2
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct pair(s) of the ambident nucleophiles is(are)

(A) AgCN/KCN

(B) RCOOAg/RCOOK

(C) AgNO2/KNO2

(D) AgI/KI
A
(B) and (C) only
B
(B) only
C
(A) and (C) only
D
(A) only
3
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement I : 2-methylbutane on oxidation with KMnO4 gives 2-methylbutan-2-ol.

Statement II : n-alkanes can be easily oxidised to corresponding alcohols with KMnO4.

Choose the correct option :
A
Both statement I and statement II are incorrect
B
Both statement I and statement II are correct
C
Statement I is correct but statement II is incorrect
D
Statement I is incorrect but statement II is correct
4
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
During which of the following processes, does entropy decrease?

(A) Freezing of water to ice at 0$$^\circ$$C

(B) Freezing of water to ice at $$-$$10$$^\circ$$C

(C) N2(g) + 3H2(g) $$ \to $$ 2NH3(g)

(D) Adsorption of CO(g) on lead surface.

(E) Dissolution of NaCl in water

Choose the correct answer from the options given below :
A
(A), (C) and (E) only
B
(B) and (C) only
C
(A), (B), (C) and (D) only
D
(A) and (E) only
JEE Main Papers
2023
2021
EXAM MAP