Which molecules/ions are most paramagnetic?

1. B₂

2. C₂

3. ${\mathrm{O}}_2^{+}$

4. ${\mathrm{O}}_2^{-}$

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

1.
2.
3.
4.

Which has linear shape but not sp hibridisation ?

1. ${\mathrm{XeF}}_2$

2. ${\mathrm{I}}_3^{-}$

3. ${\mathrm{CO}}_2$

4. Both 1 and 2

Which has highest bond energy ?

1. CO

2. CO⁺

3. N₂

4. ${\mathrm{N}}_2^{+}$

Which has highest bond angle ?

(1) NH₃

(2) H₂O

(3) H₂S

(4) PH₃

The isostere pair is

1. CO₂ and N₂O

2. CO and N₂

3. O₂ and NO₂

4. Both (1) and (2)

Select the correct order of solubility (in water) from the following:

1. SrSO₄ < CaSO₄ < MgSO₄ < BeSO₄

2. NaF < KF < RbF < CsF

3. Ba(OH)₂ > Sr(OH)₂ > Ca(OH)₂ > Mg(OH)₂

4 All of the above

Which of the following molecules exhibits H-bonding?

Compound that is isoelectronic with an adduct of "Diborane and Ammonia" is:

1. Hydrogen peroxide.

2. Diborane (at absolute zero temp.).

3. First member of alkyne series.

4. Diborane (at 10$°$C temp).

Which of the following leads to bonding orbital?

1.		2.
3.		4.