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1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Which of the following set of molecules will have zero dipole moment?
A
Boron trifluoride, hydrogen, fluoride, carbon dioxide, 1, 3-dichlorobenzene
B
Nitrogen trifluoride, beryllium difluoride, water, 1, 3-dichlorobenzene
C
Boron trifluoride, beryllium difluoride, carbon dioxide, 1, 4-dichlorobenzene
D
Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Identify a molecule which does not exist.
A
Li2
B
C2
C
O2
D
He2
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
The number of sigma ($$\sigma $$) and pi ($$\pi $$) bonds in pent-2-en-4-yne is -
A
11 $$\sigma $$ bonds and 2 $$\pi $$ bonds
B
13 $$\sigma $$ bonds and no $$\pi $$ bonds
C
10 $$\sigma $$ bonds and 3 $$\pi $$ bonds
D
8 $$\sigma $$ bonds and 5 $$\pi $$ bonds
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
The manganate and permanganate ions are tetrahedral due to :
A
The $$\pi $$-bonding involves overlap of p-orbitals of oxygen with p-orbtials of manganese
B
The $$\pi $$-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
C
The $$\pi $$-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
D
There is no $$\pi $$-bonding
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