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Chemical Bonding and Molecular Structure · Question 41

AIPMT 2015MCQEasy📈 Topic in 62% papers+4−1
1

Decreasing order of stability of O2, O2-, O2+ and O22- is

  1. O22- > O2- > O2 > O2+
  2. O2 > O2+ > O22- > O2-
  3. O2- > O22- > O2+ > O2
  4. O2+ > O2 > O2- > O22-

Answer

(4) O2+ > O2 > O2- > O22-

Solution

Bond order = 12(Nb - Na); O2 has 16 electrons with Nb = 10.

O2+ (15 e⁻): Na = 5 ⇒ B.O. = 10 - 52 = 2.5

O2 (16 e⁻): Na = 6 ⇒ B.O. = 10 - 62 = 2

O2- (17 e⁻): Na = 7 ⇒ B.O. = 10 - 72 = 1.5

O22- (18 e⁻): Na = 8 ⇒ B.O. = 10 - 82 = 1

∵ Stability increases with bond order,

∴ O2+ > O2 > O2- > O22-

Answer: (4)

AIPMT 2015

Keep practising — Chemical Bonding and Molecular Structure

2

Which of the following pairs of ions are isoelectronic and isostructural ?

  1. SO32-, NO3-
  2. ClO3-, SO32-
  3. CO32-, SO32-
  4. ClO3-, CO32-
AIPMT 2015 (Cancelled)
3

The correct bond order in the following species is

  1. O2+ < O2- < O22+
  2. O2- < O2+ < O22+
  3. O22+ < O2+ < O2-
  4. O22+ < O2- < O2+
AIPMT 2015 (Cancelled)
4

Which of the following options represents the correct bond order ?

  1. O2- > O2 < O2+
  2. O2- < O2 > O2+
  3. O2- > O2 > O2+
  4. O2- < O2 < O2+
AIPMT 2015 (Cancelled)
5

Maximum bond angle at nitrogen is present in which of the following ?

  1. NO2+
  2. NO3-
  3. NO2
  4. NO2-
AIPMT 2015 (Cancelled)
6

Which of the following species contains equal number of σ- and π-bonds ?

  1. (CN)2
  2. CH2(CN)2
  3. HCO3-
  4. XeO4
AIPMT 2015 (Cancelled)
7

Which of the following molecules has the maximum dipole moment?

  1. CO2
  2. CH4
  3. NH3
  4. NF3
AIPMT 2014
8

Which one of the following species has plane triangular shape?

  1. N3-
  2. NO3-
  3. NO2-
  4. CO2
AIPMT 2014
9

XeF2 is isostructural with

  1. SbCl3
  2. BaCl2
  3. TeF2
  4. ICl2-
NEET 2013
10

Which of the following is a polar molecule?

  1. SiF4
  2. XeF4
  3. BF3
  4. SF4
NEET 2013
11

Which of the following is paramagnetic?

  1. CN-
  2. NO+
  3. CO
  4. O2-
NEET 2013

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