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Chemical Bonding and Molecular Structure · Question 42

AIPMT 2015 (Cancelled)MCQMedium📈 Topic in 75% papers+4−1
1

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

  1. SO32-, NO3-
  2. ClO3-, SO32-
  3. CO32-, SO32-
  4. ClO3-, CO32-

Answer

(2) ClO3-, SO32-

Solution

Number of electrons:

SO32- = 16 + 24 + 2 = 42; NO3- = 7 + 24 + 1 = 32

ClO3- = 17 + 24 + 1 = 42; CO32- = 6 + 24 + 2 = 32

⇒ Isoelectronic pair: ClO3- and SO32- (42 electrons each).

Shape: in both, the central atom has 3 bond pairs + 1 lone pair (sp3) ⇒ both are pyramidal.

∵ NO3- and CO32- are trigonal planar (sp2), the other pairs are not isostructural.

∴ ClO3- and SO32- are isoelectronic and isostructural.

Answer: (2)

AIPMT 2015 (Cancelled)

Keep practising — Chemical Bonding and Molecular Structure

2

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)
3

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)
4

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

  1. NO2+
  2. NO3-
  3. NO2
  4. NO2-
AIPMT 2015 (Cancelled)
5

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)
6

Which of the following molecules has the maximum dipole moment?

  1. CO2
  2. CH4
  3. NH3
  4. NF3
AIPMT 2014
7

Which one of the following species has plane triangular shape?

  1. N3-
  2. NO3-
  3. NO2-
  4. CO2
AIPMT 2014
8

XeF2 is isostructural with

  1. SbCl3
  2. BaCl2
  3. TeF2
  4. ICl2-
NEET 2013
9

Which of the following is a polar molecule?

  1. SiF4
  2. XeF4
  3. BF3
  4. SF4
NEET 2013
10

Which of the following is paramagnetic?

  1. CN-
  2. NO+
  3. CO
  4. O2-
NEET 2013
11

Which one of the following molecules contains no bond?

  1. SO2
  2. NO2
  3. CO2
  4. H2O
NEET 2013

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