1
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
According to molecular orbital theory, the species among the following that does not exist is :
A
$${O_2}^{2 - }$$
B
$$B{e_2}$$
C
$$H{e_2}^ - $$
D
$$H{e_2}^ + $$
2
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct set from the following in which both pairs are in correct order of melting point is :
A
LiCl > LiF ; NaCl > MgO
B
LiCl > LiF ; MgO > NaCl
C
LiF > LiCl ; NaCl > MgO
D
LiF > LiCl ; MgO > NaCl
3
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :
A
Linear; 180$$^\circ$$
B
T-shaped; 180$$^\circ$$ and 90$$^\circ$$
C
Trigonal planar; 120$$^\circ$$
D
Distorted trigonal planar; 135$$^\circ$$ and 90$$^\circ$$
4
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following are isostructural pairs ?

A. $$SO_4^{2 - }$$ and $$CrO_4^{2 - }$$

B. SiCl4, and TiCl4

C. NH3 and NO3-

D. BCl3 and BrCl3
A
B and C only
B
C and D only
C
A and B only
D
A and C only
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12