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Chemical Bonding and Molecular Structure · Question 106

AIPMT 2000MCQEasy📈 Topic in 0% papers+4−1
1

d - p bond present in

  1. CO32-
  2. PO43-
  3. NO3-
  4. NO2-

Answer

(2) PO43-

Solution

A d - p bond needs vacant d orbitals on the central atom, i.e. an element of the third period or beyond.

C and N (second period) have no d orbitals ⇒ in CO32-, NO3- and NO2- the π bonds are p - p .

P (third period) uses its 3d orbitals ⇒ in PO43- the P=O π bond is d - p (d orbital of P with p orbital of O).

Answer: (2)

AIPMT 2000

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2

Right order of dissociation energy N2 and N2+ is

  1. N2 > N2+
  2. N2 = N2+
  3. N2+ > N2
  4. none
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3

Which species does not exhibit paramagnetism?

  1. N2+
  2. O2-
  3. CO
  4. NO
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4

Which compound forms linear polymer due to H-bond?

  1. H2O
  2. NH3
  3. HF
  4. HCl
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