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1
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Match items of List-I with those of List-II :

List - I
(Property)		 List - II
(Example)
(a) Diamagnetism (i) MnO
(b) Ferrimagnetism (ii) $${O_2}$$
(c) Paramagnetism (iii) NaCl
(d) Antiferromagnetism (iv) $$F{e_3}{O_4}$$


Choose the most appropriate answer from the options given below :
A
(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
B
(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
C
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
D
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
2
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :
A
1.5 and paramagnetic
B
1.5 and diamagnetic
C
2 and diamagnetic
D
1 and paramagnetic
3
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the following the correct bond order sequence is :
A
$$O_2^{2 - } > O_2^ + > O_2^ - > {O_2}$$
B
$$O_2^ + > O_2^ - > O_2^{2 - } > {O_2}$$
C
$$O_2^ + > {O_2} > O_2^ - > O_2^{2 - }$$
D
$${O_2} > O_2^ - > O_2^{2 - } > O_2^ + $$
4
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :
A
SO3
B
O2
C
SO2
D
CO$$_3^{2 - }$$
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