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Chemical Bonding and Molecular Structure · Question 71

AIPMT 2010 (Mains)MCQEasy📈 Topic in 12% papers+4−1
1

Some of the properties of the two species, NO3- and H3O+ are described below. Which one of them is correct?

  1. Dissimilar in hybridization for the central atom with different structures.
  2. Isostructural with same hybridization for the central atom.
  3. Isostructural with different hybridization for the central atom.
  4. Similar in hybridization for the central atom with different structures.

Answer

(1) Dissimilar in hybridization for the central atom with different structures.

Solution

NO3-: N has 3 σ bonds and no lone pair ⇒ sp2, trigonal planar.

H3O+: O has 3 bond pairs and 1 lone pair ⇒ sp3, trigonal pyramidal.

∴ The two species differ both in hybridisation and in structure.

Answer: (1)

AIPMT 2010 (Mains)

Keep practising — Chemical Bonding and Molecular Structure

2

In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation ?

  1. NO2- and NH3
  2. BF3 and NO2-
  3. NH2- and H2O
  4. BF3 and NH2-
AIPMT 2010 (Prelims)
3

Which one of the following species does not exist under normal conditions?

  1. Be2+
  2. Be2
  3. B2
  4. Li2
AIPMT 2010 (Prelims)
4

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?

  1. SF4
  2. I3-
  3. SbCl52-
  4. PCl5
AIPMT 2010 (Prelims)
5

The correct order of increasing bond angles in the following species is

  1. Cl2O < ClO2 < ClO2-
  2. ClO2 < Cl2O < ClO2-
  3. Cl2O < ClO2- < ClO2
  4. ClO2- < Cl2O < ClO2
AIPMT 2010 (Prelims)
6

What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas?

  1. Dipole-dipole interaction
  2. Covalent bonds
  3. London dispersion force
  4. Hydrogen bonding
AIPMT 2009
7

According to MO theory which of the lists ranks the nitrogen species in terms of increasing bond order ?

  1. N22- < N2- < N2
  2. N2 < N22- < N2-
  3. N2- < N22- < N2
  4. N2- < N2 < N22-
AIPMT 2009
8

In which of the following molecules/ions BF3, NO2-, NH2- and H2O, the central atom is sp2 hybridised?

  1. NH2- and H2O
  2. NO2- and H2O
  3. BF3 and NO2-
  4. NO2- and NH2-
AIPMT 2009
9

The energy absorbed by each molecule (A2) of a substance is 4.4 10-19 J and bond energy per molecule is 4.0 10-19 J. The kinetic energy of the molecule per atom will be

  1. 2.2 10-19 J
  2. 2.0 10-19 J
  3. 4.0 10-20 J
  4. 2.0 10-20 J
Out of syllabusAIPMT 2009
10

In the case of alkali metals, the covalent character decreases in the order

  1. MF > MCl > MBr > MI
  2. MF > MCl > MI > MBr
  3. MI > MBr > MCl > MF
  4. MCl > MI > MBr > MF
Out of syllabusAIPMT 2009
11

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them

  1. NO < O2- < C22- < He2+
  2. O2- < NO < C22- < He2+
  3. C22- < He2+ < O2- < NO
  4. He2+ < O2- < NO < C22-
AIPMT 2008

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