1
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 10th January Morning Slot

The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:
A
sp3d and 2
B
sp3d2 and 2
C
sp3d and 1
D
sp3d2 and 1

Explanation

H = $${1 \over 2}$$ (V + M - c + a)

$$ \therefore $$ H = $${1 \over 2}$$(8 + 4) = 6


From structure, it is clear that it has five bond pairs and one lone pair.
2
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 10th January Evening Slot

The pair that contains two P – H bonds in each of the oxoacids is
A
H3PO2 and H4P2O5
B
H4P2O5 and H4P2O6
C
H4P2O5 and H3PO3
D
H3PO3 and H3PO2

Explanation

3
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 10th January Evening Slot

The number of 2-centre-2-electron and 3-centre -2-electron bonds in B2H6, respectively, are :
A
2 and 2
B
2 and 1
C
2 and 4
D
4 and 2

Explanation

4
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 12th January Evening Slot

The element that shows greater ability to form p$$\pi $$-p$$\pi $$ multiple bonds, is -
A
Si
B
Ge
C
C
D
Sn

Explanation


In carbon family size of carbon is smallest.

A size of carbon atom is small, so between 2p orbital of two carbon atom effective overlapping happens.

But when size of atom increases then effective overlapping does not happens between atoms.

That is why in carbon family, C will have strongest p$$\pi $$ $$-$$ p$$\pi $$ bond.

Questions Asked from Chemical Bonding & Molecular Structure

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