Combination of atoms A and B that forms an anti-bonding molecular orbital is :

1. $\frac{{\mathrm{\Psi }}_{\mathrm{A}}^2}{{\mathrm{\Psi }}_{\mathrm{B}}^2}$

2. ${\mathrm{\Psi }}_{\mathrm{A}}^2\times {\mathrm{\Psi }}_{\mathrm{B}}^2$

3. ${\mathrm{\Psi }}_{\mathrm{A}}+{\mathrm{\Psi }}_{\mathrm{B}}$

4. ${\mathrm{\Psi }}_{\mathrm{A}}-{\mathrm{\Psi }}_{\mathrm{B}}$

The correct order of increasing dipole moment is : 

1. ${\mathrm{CF}}_4$ < ${\mathrm{NH}}_3$ < ${\mathrm{NF}}_3$ < ${\mathrm{H}}_2\mathrm{O}$

2. ${\mathrm{CF}}_4$ < ${\mathrm{NH}}_3$ < ${\mathrm{H}}_2\mathrm{O}$ < ${\mathrm{NF}}_3$

3. ${\mathrm{CF}}_4$< ${\mathrm{NF}}_3$ < ${\mathrm{H}}_2\mathrm{O}$ < ${\mathrm{NH}}_3$

4. ${\mathrm{CF}}_4$< ${\mathrm{NF}}_3$< ${\mathrm{NH}}_3$ < ${\mathrm{H}}_2\mathrm{O}$ 

Xe F${}_2$ is isostructural with : 

1. ${\mathrm{SbCl}}_3$

2. ${\mathrm{BCl}}_3$

3. ${\mathrm{TeF}}_2$

4. ${\mathrm{ICl}}_2^{-}$

Non-Zero dipole moment is shown by : 

1. ${\mathrm{CO}}_2$

2. p-Dichlorobenzene

3. Carbontetrachloride

4. Water.

The hybridization of orbitals of N atom in $N{O}_3^{-}, N{O}_2^{+, }and N{H}_4^{+}$ are respectively:

1. $sp, s{p}^2, s{p}^3$

2. $s{p}^2, sp, s{p}^3$

3. $sp, s{p}^3, s{p}^2$

4. $s{p}^2, s{p}^3, sp$

Mg₂C₃ reacts with water forming propyne ${\mathrm{C}}_3^{4-}$ . The number of sigma and pie bonds in \(C_{3}^{4-}\)is-  

1. Two sigma and two pi bonds.             

2. Three sigma and one pi bonds.           

3. Two sigma and one pi bonds.          

4. Two sigma and three pi bonds.

The correct order of \(\mathrm{C-O}\) bond length among \(\mathrm{CO},\mathrm{CO}_3^{2-},\) and \(\mathrm{CO_2}\) is :

1. \(\mathrm{CO}_2<\mathrm{CO}_3^{2-}<\mathrm{CO} \)
2. \(\mathrm{CO}<\mathrm{CO}_3^{2-}<\mathrm{CO}_2 \)
3. \(\mathrm{CO}_3^{2-}<\mathrm{CO}_2<\mathrm{CO} \)
4. \(\mathrm{CO}<\mathrm{CO}_2<\mathrm{CO}_3^{2-}\)

Which of the following pairs of ions are isoelectronic and isostructural?

1. ${\mathrm{CO}}_3^{2-}, {\mathrm{SO}}_3^{2-}$

2. ${\mathrm{ClO}}_3^{-}, {\mathrm{CO}}_3^{2-}$

3. ${\mathrm{SO}}_3^{2-}, {\mathrm{NO}}_3^{-}$

4. ${\mathrm{ClO}}_3^{-}, {\mathrm{SO}}_3^{2-}$

Match the compounds given in Column I with the hybridization and shape given in Column II and mark the correct option. 

${\mathrm{H}}_2\mathrm{O}$ has a net dipole moment while
\(BeF_2\) has zero dipole moment because :

1. F is more electronegative than oxygen.

2. Be is more electronegative than oxygen. 

3. ${\mathrm{H}}_2\mathrm{O}$ $$ molecule is linear and \(BeF_2\) is bent.

4. ${\mathrm{BeF}}_2$ molecule is linear and ${\mathrm{H}}_2\mathrm{O}$ is bent.