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1
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which among the following species has unequal bond lengths?
A
XeF4
B
BF$$_4^ - $$
C
SiF4
D
SF4
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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
$$H{e_2}^ + $$
3
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
4
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$$^\circ$$
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