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1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
A
$$O_2^ - $$ or $$O_2^ + $$
B
O2, $$O_2^ - $$ or $$O_2^ + $$
C
O2 or $$O_2^ + $$
D
O2 or $$O_2^ - $$
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Arrange the following bonds according to their average bond energies in descending order :
C–Cl, C–Br, C–F, C–I
A
C–Br > C–I > C–Cl > C–F
B
C–Cl > C–Br > C–I > C–F
C
C–I > C–Br > C–Cl > C–F
D
C–F > C–Cl > C–Br > C–I
3
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The bond order and the magnetic characteristics of CN- are :
A
3, paramagnetic
B
$$2{1 \over 2}$$, paramagnetic
C
3, diamagnetic
D
$$2{1 \over 2}$$, diamagnetic
4
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The dipole of CCl4, CHCl3 and CH4 are in the order :
A
CCl4 < CH4 < CHCl3
B
CH4 = CCl4 < CHCl3
C
CH4 < CCl4 < CHCl3
D
CHCl3 < CH4= CCl4
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