Which of the following has p$$\pi $$ $$-$$ d$$\pi $$ bonding?
A
NO3$$-$$
B
SO32$$-$$
C
BO33$$-$$
D
CO32$$-$$
Explanation
Electronic structure of S atom in excited state
In 'S' unhybride d- orbital is present, which will
involved in bond formation with oxygen
atom.
In oxygen two unpaired p- orbital is present in
these one is involved in $$\sigma $$ bond formation
while other is used in $$\pi $$ bond formation.
So, in SO32$$-$$, p$$\pi $$ $$-$$ d$$\pi $$ bonding present.
2
AIPMT 2001
MCQ (Single Correct Answer)
In X - H --- Y, X and Y both are electronegative elements. Then
A
electron density on X will increase and on H will decrease
B
in both electron density will increase
C
in both electron density will decrease
D
on X electron density will decrease and on H increases.
Explanation
As X and Y both are electronegative elements thus both attracts the electron density from H thus, electron density on H decreases and on X it increases.
3
AIPMT 2001
MCQ (Single Correct Answer)
In which of the following bond angle is maximum ?
A
NH3
B
NH4+
C
PCl3
D
SCl2
Explanation
Bond angle is maximum in NH4+ tetrahedral molecule with bond angle 109°.
4
AIPMT 2001
MCQ (Single Correct Answer)
Nitrogen forms N2, but phosphorus does not form P2, however, it converts P4, reason is
A
triple bond present between phosphorus atom
B
p$$\pi $$ $$-$$ p$$\pi $$ bonding is weak
C
p$$\pi $$ $$-$$ p$$\pi $$ bonding is strong
D
multiple bonds form easily.
Explanation
For strong $$\pi $$-bonding, p$$\pi $$ - p$$\pi $$ bonding should be strong. In case of P, due to larger size as compared to N-atom, p$$\pi $$ - p$$\pi $$ bonding is not so strong.
Questions Asked from Chemical Bonding and Molecular Structure
On those following papers in MCQ (Single Correct Answer)
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