In a chemical change from PCl₃ $\to$ PCl₅ the hybrid state of P changes from :

1. sp² to sp³

2. sp³ to sp²

3. sp³ to sp³d

4. sp³ to dsp

The shape of covalent molecule AX₃ is:

If the central atom in certain molecule has two lone pairs and three bond pairs, the shape of the molecule could be:

The geometrical arrangement and shape of $I_3^{-}$ are respectively:

1. Trigonal bipyramidal geometry, linear shape

2. Hexagonal structure, linear shape

3. Triangular planar geometry, triangular shape

4. Tetrahedral geometry, pyramidal shape

Which has non-zero dipole moment?

1. PCl₅

2. PCl₃F₂

3. PCl₃Br₂

4. PCl₃(CH₃)₂

Which molecules/ions are most paramagnetic?

1. B₂

2. C₂

3. $O_2^{+}$

4. $O_2^{-}$

The favourable conditions for the formation of electrovalency is

1. Small cation and small anion

2. Large cation and small anion

3. Small cation and large anion

4. Large cation and large anion

The correct statement is-

1. When O₂ is converted into $O_2^{+}$ then bond distance increases

2. When N₂ is converted into $N_2^{+}$ then bond distance increases

3. When CO is converted into CO⁺ then bond distance increases

4. All of the above

Which has highest bond energy?

1. CO

2. CO⁺

3. N₂

4. $N_2^{+}$

In which case observed dipole moment is greater than theoretical dipole moment?

1. 

2. 

3. 

4.