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 compound that has the lowest boiling point is:

The correct statement about hydrolysis of ${\mathrm{BCl}}_3$ and ${\mathrm{NCl}}_3$ is-

1. ${\mathrm{NCl}}_3$ is hydrolysed and gives $\mathrm{HOCl}$ but ${\mathrm{BCl}}_3$ is not hydrolysed

2. Both ${\mathrm{NCl}}_3$ and ${\mathrm{BCl}}_3$ on hydrolysis gives $\mathrm{HCl}$

3. ${\mathrm{NCl}}_3$ on hydrolysis gives $\mathrm{HOCl}$  but ${\mathrm{BCl}}_3$ gives $\mathrm{HCl}$

4. Both ${\mathrm{NCl}}_3$ and ${\mathrm{BCl}}_3$ on hydrolysis gives $\mathrm{HOCl}$

The correct sequence of the polarity of the following molecule is
a. Benzene                         

b. Inorganic Benzene

c. ${\mathrm{PCl}}_3{\mathrm{F}}_{2 }$                           

d. ${\mathrm{PCl}}_2{\mathrm{F}}_3$

(Where P=polar, NP=non-polar)

The incorrect order of boiling point is-

1. ${\mathrm{H}}_2\mathrm{O} > {\mathrm{CH}}_3\mathrm{OH}$             

2. $\mathrm{N}{\left({\mathrm{CH}}_3\right)}_3< \mathrm{NH}{\left({\mathrm{CH}}_3\right)}_2$

3. ${\mathrm{H}}_3{\mathrm{PO}}_4> {\mathrm{Me}}_3{\mathrm{PO}}_4$         

4. ${\mathrm{CH}}_3{\mathrm{N}}_3> {\mathrm{HN}}_3$

Which of the following is not a perfect nonpolar molecule?

1. $B_3{N}_3{H}_6$                     

2. CCl₄

3. ${\mathrm{SO}}_3$                             

4. All of the above

Choose the correct option for the following molecule:

1. Non planar   

2. $\mu \ne 0$   

3. Both (1) and (2)     

4. $\mu =0$

The compound that has the highest ionic character associated with the X-Cl bond is:

1. ${\mathrm{PCl}}_5$ 

2. ${\mathrm{BCl}}_3$

3. ${\mathrm{CCl}}_4$

4. ${\mathrm{SiCl}}_4$

The least polar bond is present in which of the following?

The correct order of increasing s-character (in percentage) in the hybrid orbitals of the following molecules/ions is: