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

1.	\(\mathrm{NH}^-_2> \mathrm{NH}_3>~\mathrm{NH}^+_4\)	2.	\(\mathrm{NH}^+_4> \mathrm{NH}_3>~\mathrm{NH}^-_2\)
3.	\(\mathrm{NH}_3> \mathrm{NH}^-_2>~\mathrm{NH}^+_4\)	4.	\(\mathrm{NH}_3> \mathrm{NH}^+_4>~\mathrm{NH}^-_2\)

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

1. ${\mathrm{ClO}}_3^{-}$

2. ${\mathrm{ClO}}_3$

3. ${\mathrm{ClO}}_2$

4. ${\mathrm{ClO}}_2^{-}$

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

The pair of electrons in the given carbanion, CH₃C≡C^-, is present in which of the following orbitals?

The incorrect statement among the following regarding the molecules of CH_4, NH₃, and H₂O is:

Which among the following species has a triangular planar shape?

Paramagnetic species among the following is:

1. CO               

2. ${\mathrm{O}}_2^{-}$

3. CN^-               

4. NO⁺

The correct order of solubility in an aqueous medium is: 

1. CuS > ZnS > Na₂S

2. ZnS > Na₂S > CuS

3. Na₂S > CuS > ZnS

4. Na₂S > ZnS > CuS

XeF₂ is isostructural with : 

1. TeF₂

2. ICI₂^-

3. SbCl₃

4. BCl₃

In which of the following pairs of molecules/ions, the central atoms have \(\mathrm{sp}^2\) hybridisation?