The bond angle is maximum in:

1. $N{H}_3$

2. $N{H}_4^{+}$

3. $PC{l}_3$

4. $SC{l}_2$

The incorrect statements among the following for sigma- and pi- bonds formed between two carbon atoms is:

If the main axis of a diatomic molecule is z, then the molecular orbital p_x and p_y overlap to form which of the following orbital:

1.  $\mathrm{\pi }$ molecular orbtial
2.  σ molecular orbital
3.  δ molecular orbtial
4.  No bond will form

Which of the following two species in the pair are isostructural:

1.  $Xe{F}_2$ $,$ $I{F}_2^{-}$

2. $N{H}_3$ $,$ $B{F}_3$

3. $$ $C{O}_3^{-2}$ $,$ $S{O}_3^{-2}$

4. $PC{l}_5$ $,$ $IC{I}_5$

In NO₃^– ion, the number of bond pair and lone pair of electrons on nitrogen atom are respectively:

 ${\mathrm{p}}_{\mathrm{\pi }}-{\mathrm{d}}_{\mathrm{\pi }}$ bonding is present in:

1. ${\mathrm{NO}}_3^{-}$

2. ${{\mathrm{SO}}_3}^{-2}$

3. ${{\mathrm{BO}}_3}^{-3}$

4. ${{\mathrm{CO}}_3}^{-2}$

Among the following, iso-electronic species are:

1. CO₂, NO₂

2. $N{O}_2^{-}$, CO₂

3. CN^–, CO

4. SO₂, CO₂

The dipole moment of compound AB is 10.92 D and that of compound CD is 12.45 D. If the bond length of AB is 2.72 A° and that of CD is 2.56 A°, then for these compounds the correct statement is:
1.  More ionic nature in AB
2.  More ionic nature in CD
3.  Equal in both
4.  Cannot be predicted

The lone pairs in the BrF₃ molecule, occupy equatorial positions to minimize: