Which of the following compounds is electron deficient?

1. BaCl₂

2. BCl₃

3. CCl₄

4. PCl₅

Identify the species that contains a dπ–pπ bond.

The compound that forms linear polymer due to H-bond is:

How many antibonding electron pair(s) is/are present in the \(O_{2}^{2-}\) ion?

The correct order of dissociation energy of N₂ and N₂⁺ is:

Which of the following sets consists of isoelectronic species?

1. CO, CN^–, NO⁺, C₂^2–

2. CO^–, CN, NO, C₂^–

3. CO⁺, CN⁺, NO^–, C₂

4. CO, CN, NO, C₂

Which of the following molecules has trigonal planar geometry:

Which of the following would have a permanent dipole moment?

The correct sequence of increasing covalent character is represented by:

1. ${\mathrm{BeCl}}_2<\mathrm{NaCl}<\mathrm{LiCl}$

2. $\mathrm{NaCl}<\mathrm{LiCl}<{\mathrm{BeCl}}_2$

3. ${\mathrm{BeCl}}_2<\mathrm{LiCl}<\mathrm{NaCl}$

4. $\mathrm{LiCl}<\mathrm{NaCl}<{\mathrm{BeCl}}_2$

Which of the following is the electron deficient molecule:

1. C₂H₆ 

2. SiH₄

3. PH₃

4. B₂H₆