Chemical Bonding and Molecular Structure

In NO3- ion number of bond pair and lone pair of electrons on nitrogen atom are

1. 2, 2
2. 3, 1
3. 1, 3
4. 4, 0

Main axis of a diatomic molecule is z, atomic orbitals px and py overlap to form which of the following orbitals.

1. molecular orbital
2. molecular orbital
3. molecular orbital
4. No bond will form

Which of the following two are isostructural?

1. XeF2, IF2-
2. NH3, BF3
3. CO32-, SO32-
4. PCl5, ICl5

In which of the following bond angle is maximum ?

1. NH3
2. NH4+
3. PCl3
4. SCl2

In X-H Y, X and Y both are electronegative elements. Then

1. electron density on X will increase and on H will decrease
2. in both electron density will increase
3. in both electron density will decrease
4. on X electron density will decrease and on H will increase.

d - p bond present in

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

Right order of dissociation energy N2 and N2+ is

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

Which species does not exhibit paramagnetism?

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

Which compound forms linear polymer due to H-bond?

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