Which of the following molecules exhibits H-bonding?

1.	CH4	2.	H2Se
3.	N2H4	4.	H2S

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).

The correct order of H-bond strength in the following compounds is:

1. H₂O > H₂O₂ > HF > H₂S

2. HF >  H₂O₂ > H₂O > H₂S

3. HF > H₂O > H₂S > H₂O₂

4. HF > H₂O > H₂O₂ > H₂S

 A pair of species that have identical shapes is : 

1. NO₂⁺ and NO₂^-

2. PCl₅ and BrF₅

3. XeF₄ and ICI₄^-

4. TeCl₄ and XeO₄

Among the following species, the one that has the highest bond energy is:

1. ${\mathrm{N}}_2^{+}$

2. ${\mathrm{O}}_2$

3. ${\mathrm{CO}}^{+}$

4. ${\mathrm{N}}_2$

${\mathrm{N}}_2$ and ${\mathrm{O}}_2$ are converted to monocations ${\mathrm{N}}_2^{+}$ and ${\mathrm{O}}_2^{+}$ respectively. Which of the following is incorrect?

1. In ${\mathrm{N}}_2^{+}$, the $\mathrm{N}-\mathrm{N}$ bond weakens.

2. In ${\mathrm{O}}_2^{+}$, the $\mathrm{O}-\mathrm{O}$ bond order increases.

3. In ${\mathrm{O}}_2^{+}$, the paramagnetism decreases.

4. ${\mathrm{N}}_2^{+}$ becomes diamagnetic.

The bond angles of \(\mathrm{NH}_3, \mathrm{NH}^+_4~\mathrm{and}~\mathrm{NH}^-_2\) are in the order : 

Which of the following has a maximum 'Cl-O' bond order?

1. ${\mathrm{ClO}}_3^{-}$

2. ${\mathrm{ClO}}_3$

3. ${\mathrm{ClO}}_2$

4. ${\mathrm{ClO}}_2^{-}$

The correct order of the dipole moment of the following molecules is : 

In which of the following compounds is an intramolecular hydrogen bond present?