Polarity and Dipole Moments

Q. In compound $\left[M\right(CO{)}_n{]}^z$, the correct match for highest ${}^{\prime }M-C^{\prime }$ bond length for given M, n and z respectively :

1. $M=Mn;n=6;z=+1$
2. $M=Cr;n=6;z=0$
3. $M=Ti;n=6;z=-2$
4. $M=V;n=6;z=-1$

Q. Arrange the following compounds in order of increasing dipole moment.

1. Toluene
2. m-dibromobenzene
3. o-dibromobenzene
4. p-dibromobenzene

Q. Which of the following are arranged in the decreasing order of dipole moment?

1. $C{H}_{3}Cl,C{H}_{3}Br,C{H}_{3}F$
2. $C{H}_{3}Cl,C{H}_{3}F,C{H}_{3}Br$
3. $C{H}_{3}Br,C{H}_{3}Cl,C{H}_{3}F$
4. $C{H}_{3}Br,C{H}_{3}F,C{H}_{3}Cl$

Q. Which of the following structural isomer of compound $C_4{H}_{9}Br$, is most reactive towards $S_{N}1$ reaction?

1. 
2. 
3. 
4. 

Q. Which amongst the following is the strongest acid?

1. ${\mathrm{CHI}}_3$
2. ${\mathrm{CHCl}}_3$
3. ${\mathrm{CHBr}}_3$
4. $\mathrm{CH}{\left(\mathrm{CN}\right)}_3$

Q. The dipole moments of $CC{l}_4,CHC{l}_3$ and $C{H}_4$ are in the order:

1. $C{H}_4<CC{l}_4<CHC{l}_3$
2. $C{H}_4=CC{l}_4<CHC{l}_3$
3. $CC{l}_4<C{H}_4<CHC{l}_3$
4. $CHC{l}_3<C{H}_4=CC{l}_4$

Q.

The correct order of decreasing dipole moment is:

1. CH₃Cl, CH₃Br, CH₃F

2. CH₃Cl, CH₃F, CH₃Br

3. CH₃Br, CH₃Cl, CH₃F

4. CH₃Br, CH₃F, CH₃Cl

Q. Arrange the following compounds in order of increasing dipole moment.

1. Toluene
2. m-dibromobenzene
3. o-dibromobenzene
4. p-dibromobenzene

Q. Which amongst the following is the strongest acid?

1. ${\mathrm{CHI}}_3$
2. ${\mathrm{CHCl}}_3$
3. ${\mathrm{CHBr}}_3$
4. $\mathrm{CH}{\left(\mathrm{CN}\right)}_3$