The H $$-$$ O $$-$$ H bond angle in H2O is smaller than the H $$-$$ N $$-$$ H bond angle in NH3.
B
The H $$-$$ C $$-$$ H bond angle in CH4 is larger than the H $$-$$ N $$-$$ H bond angle in NH3.
C
The H $$-$$ C $$-$$ H bond angle in CH4, the H $$-$$ N $$-$$ H bond angle in NH3, and the H $$-$$ O $$-$$ H bond angle in H2O are all greater than 90o.
D
The H $$-$$ O $$-$$ H bond angle in H2O is larger than the H $$-$$ C $$-$$ H bond angle in CH4.
Explanation
In CH4, there is no lone pair of electrons so it is
perfectly tetrahedral in shape and has H-C-H bond
angle of 109°28′ but in NH3 there is one lone pair
which due to more repulsion with bond pairs of
electrons pushes them more closer thus bond angle
decreases to 107°. In H2O, there are two lone pair
of electrons which suppress the bond angle more
to 104.5°.
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
Predict the correct order among the following :
A
bond pair - bond pair > long pair - bond pair > lone pair - lone pair
B
lone pair - bond pair > bond pair - bond pair > lone pair - lone pair
C
lone pair - lone pair > lone pair - bond pair > bond pair - bond pair
D
lone pair - lone pair > bond pair - bond pair > lone pair - bond pair
Explanation
According to VSEPR theory, the repulsive forces between lone pair and lone pair are grater than between lone pair and bond pair which are further greater than bond pair and bond pair.
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
Among the following, which one is a wrong statement ?
A
PH5 and BiCl5 do not exist.
B
p$$\pi $$-d$$\pi $$ bonds are present in SO2.
C
SeF4 and CH4 have same shape.
D
I3+ has bent geometry.
Explanation
Questions Asked from Chemical Bonding and Molecular Structure
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
