The geometry with respect to the central atom of the following molecules are:

$\mathrm{N}({\mathrm{SiH}}_3{)}_3; {\mathrm{Me}}_3\mathrm{N}; ({\mathrm{SiH}}_3{)}_3 \mathrm{P}$

(1) planar, pyramidal, planar

(2) planar, pyramidal, pyramidal 

(3) pyramidal, pyramidal, pyramidal

(4) pyramidal, planer, pyramidal

Incorrect statement regarding ${\mathrm{BF}}_2{\mathrm{NH}}_2$ molecule is :

(1) FBF bond angle $<120\%$                     

(2) HNH bond angle $>109°28\text{'}$

(3) Exhibits intermolecular H-bond             

(4) Hybridization of N-atom is ${\mathrm{sp}}^3$

Molecule that has $\mu$ (observed) greater than $\mu$ (theoretical) is : 

1.	CHCl3	2.
3.		4.

The bond having minimum bond energy is :

(1) $\mathrm{C}—\mathrm{C}$                             

(2) $\mathrm{O}—\mathrm{O}$

(3) $\mathrm{S}—\mathrm{S}$                               

(4) $\mathrm{P}—\mathrm{P}$ 

A gas that should not be collected over water is-

1. ${\mathrm{H}}_2$

2. ${\mathrm{N}}_2$

3. ${\mathrm{CH}}_4$

4. HCl

The correct increasing order of extent of hydrolysis is :
1. ${\mathrm{CCl}}_4<{\mathrm{MgCl}}_2<{\mathrm{AlCl}}_3<{\mathrm{SiCl}}_4<{\mathrm{PCl}}_5$           
2. ${\mathrm{CCl}}_4<{\mathrm{AlCl}}_3<{\mathrm{MgCl}}_2<{\mathrm{PCl}}_5<{\mathrm{SiCl}}_4$
3. ${\mathrm{CCl}}_4<{\mathrm{SiCl}}_4<{\mathrm{PCl}}_5<{\mathrm{AlCl}}_3<{\mathrm{mgCl}}_2$           
4. ${\mathrm{CCl}}_4<{\mathrm{PCl}}_5<{\mathrm{SiCl}}_4<{\mathrm{AlCl}}_3<{\mathrm{MgCl}}_2$

Inorganic benzene reacts with HCl to form a compound ${\mathrm{B}}_3{\mathrm{N}}_3{\mathrm{H}}_9{\mathrm{Cl}}_3$. The protonation occurs at:

(1) B-atom 

(2) N-atom

(3) First at B-atom then rearrangers into N-atom 

(4) First N-atom then rearrangers into B-atom 

The correct order of initials T or F for the following statements is -

(Use T if statement is true and F if it is false)

(i)$\left({\mathrm{CH}}_3{)}_2\mathrm{P}\right({\mathrm{CF}}_3{)}_{3 }$is non-polar $\left({\mathrm{CH}}_3{)}_3\mathrm{P}\right({\mathrm{CF}}_3{)}_{2 }$ is polar molecule 

(ii) ${\mathrm{CH}}_3\hat{\mathrm{P}}{\mathrm{CH}}_3$ bond angles are equal in a molecule

(iii) ${\mathrm{PF}}_3$ will be more soluble in the polar solvent than ${\mathrm{SiF}}_4$

1. TTF               

2. FFT                     

3. FFF                           

4. FTT

Which substance has the strongest London dispersion forces?

1. $Si{H}_4$

2. $C{H}_4$

3. $Sn{H}_4$

4. $Ge{H}_4$

The compound that has the lowest boiling point is: