Among the given species, the isostructural pair is: 

1. \( \mathrm{NF}_3 \text { and } \mathrm{BF}_3 \)
2. \(\mathrm{BF}_4^{-} \text {and } \mathrm{NH}_4^{+} \)
3. \(\mathrm{BCl}_3 \text { and } \mathrm{BrCl}_3 \)
4. \(\mathrm{NH}_3 \text { and } \mathrm{NO}_3^{-}\)

The hybridization of nitrogen in ${\mathrm{NO}}_2^{+},$ ${\mathrm{NO}}_3^{-}$ and ${\mathrm{NH}}_4^{+}$ respectively is : 
1. sp, sp^3, and sp²
2. sp, sp^2, and sp³
3. sp², sp, and sp³
4. sp², sp^3, and sp

Which species lacks tetrahedral geometry?

The correct bond angle for \(\mathrm{sp}^2\) hybridization is:
1. \(90^\circ\)
2. \(120^\circ\)
3. \(180^\circ\)
4. \(109^\circ\)

Match the species in Column I with the type of hybrid orbitals in Column II.

Codes:

Match the species in Column I with the shape in Column II.

Codes:

Match the shape of molecules in Column I with the type of hybridization in Column II.

Codes:

Which of the following species have the same shape?

Choose the correct option

1. (a), (b)

2. (b), (c)

3. (c), (d)

4. (b), (d)