Which of the following compound have the same no. of lone pair with their central atom?

(i)${\mathrm{XeF}}_5^{- }$             

(ii) ${\mathrm{BrF}}_3$                 

(iii) ${\mathrm{XeF}}_2$                     

(iv) ${\mathrm{H}}_3{\mathrm{S}}^{+}$               

(v) Triple Methylene     

options are as follows :        

(1) (iv) and (v)                                     

(2) (i) and (iii) 

(3) (i) and (ii)                                     

(4) (ii) (iv), (v)

The "O$-$N$-$O" bond angle is maximum in:

$\left(a\right) N_{2}O \left(b\right)N{O_2}^{+}$
$\left(C\right)N{O_2}^{-} \left(d\right) N{O_3}^{-}$

Among following molecule $\mathrm{N}—\mathrm{Si}$ bond length is shortest:

(1) $\mathrm{N}({\mathrm{SiH}}_3{)}_3$                           

(2) $\mathrm{N}({\mathrm{SiH}}_3{)}_2$

(3) ${\mathrm{NH}}_2\left({\mathrm{SiH}}_3\right)$                         

(4) All have equal $\mathrm{N}—\mathrm{Si}$ bond length

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

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) $\mathrm{P}—\mathrm{P}$ 

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. ${\mathrm{CCl}}_4<{\mathrm{PCl}}_5<{\mathrm{SiCl}}_4<{\mathrm{AlCl}}_3<{\mathrm{MgCl}}_2$

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: