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Chemical Bonding and Molecular Structure

NEET 2016 (Phase 1)MCQEasy📈 Topic in 75% papers+4−1
Ques. 1NEET 2016 (Phase 1)

Predict the correct order among the following :

  1. bond pair - bond pair > lone pair - bond pair > lone pair - lone pair
  2. lone pair - bond pair > bond pair - bond pair > lone pair - lone pair
  3. lone pair - lone pair > lone pair - bond pair > bond pair - bond pair
  4. lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

Answer

(3) lone pair - lone pair > lone pair - bond pair > bond pair - bond pair

Solution

As per NCERT (VSEPR theory), a lone pair is localised on the central atom only, so it occupies more space than a bond pair, which is shared between two atoms.

⇒ Repulsions decrease in the order:

lone pair–lone pair > lone pair–bond pair > bond pair–bond pair

Answer: (3)

Keep practising — Chemical Bonding and Molecular Structure

Ques. 2NEET 2016 (Phase 2)

Which one of the following compounds shows the presence of intramolecular hydrogen bond?

  1. H2O2
  2. HCN
  3. Cellulose
  4. Concentrated acetic acid
Ques. 3NEET 2016 (Phase 2)

The hybridizations of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are

  1. sp, sp3 and sp2
  2. sp2, sp3 and sp
  3. sp, sp2 and sp3
  4. sp2, sp and sp3
Ques. 4NEET 2016 (Phase 2)

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

  1. CO32-, NO3-
  2. ClO3-, CO32-
  3. SO32-, NO3-
  4. ClO3-, SO32-
Ques. 5NEET 2016 (Phase 2)

The correct geometry and hybridization for XeF4 are

  1. octahedral, sp3d2
  2. trigonal bipyramidal, sp3d
  3. planar triangle, sp3d3
  4. square planar, sp3d2
Ques. 6NEET 2016 (Phase 2)

Among the following, which one is a wrong statement ?

  1. PH5 and BiCl5 do not exist.
  2. p -d bonds are present in SO2.
  3. SeF4 and CH4 have same shape.
  4. I3+ has bent geometry.
Ques. 7AIPMT 2015

In which of the following pairs, both the species are not isostructural ?

  1. Diamond, Silicon carbide
  2. NH3, PH3
  3. XeF4, XeO4
  4. SiCl4, PCl4+
Ques. 8AIPMT 2015

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-
Ques. 9AIPMT 2015 (Cancelled)

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

  1. SO32-, NO3-
  2. ClO3-, SO32-
  3. CO32-, SO32-
  4. ClO3-, CO32-
Ques. 10AIPMT 2015 (Cancelled)

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+
Ques. 11AIPMT 2015 (Cancelled)

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+

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