Dipole Moment

Q.

Write the significance/applications of dipole moment.

Q. In which of the following processes entropy decreases?

1. 
2. 
3. 
4. 

Q.

A species having a carbon atom possessing a sextet of electrons and a positive charge is called as:

1. Chirality

2. Metamerism

3. Metamerism

4. Carbaanion

Q. doeas cross conjugation increase or decrease stability of a compound?

Q. Weight of 1 x 10 to the powee of 22 molecules of CuSO4.5H2O is ? (weight of cu =63.5 )

Q. 71 Molecular weight of KMnO4 in acidic medium and neutral medium will be respectively

Q.

Which one of the halogen acids is a liquid

1. HF

2. HCl

3. HI

4. HBr

Q. Which of these has zero net dipole moment?

1. 

2. 

3. 

4. 

Q. what is main differences between ion ion , dipole dipole and vander wall interactions

Q. Which of the following molecules are polar: $O{F}_2,HF,S{O}_3$ ?

1. All except $S{O}_3$
2. Only $HF$
3. Only $HF$ and $O{F}_2$
4. None of these

Q. Which of the compounds contain both polar and non-polar bonds?

1. $H_2{O}_2$
2. $HCN$
3. $C{H}_4$
4. $C{O}_2$

Q.

Which has higher dipole moment?

1. 

2. 

3. All three have same dipole moment

4. 

Q.

In dipole-induced dipole forces, the dipole moments (μ) of polar and non polar molecules are

1. μ < 0 and μ > 0

2. μ > 0 and μ = 0

3. μ = 0 for both

4. μ = 0 and μ < 0

Q. Dipole moment is usually expressed in debye units . From the formula the unit of dipole moment is coulomb metrev. The relation between both units of dipole moment is ?

Q.

Which of the following will show least dipole character

1. Water

2. Ethanol

3. Ethane

4. Ether

Q. $H_{2}O$ has a net dipole moment but $Be{F}_2$ has zero dipole moment. This is because:

1. $H_{2}O$ molecule is linear while $Be{F}_2$ is bent
2. $Be{F}_2$ molecule is linear while $H_{2}O$ is bent
3. Fluorine is more electronegative than oxygen
4. Be is more electronegative than oxygen

Q.

The correct order of dipole moment is _____

1. $C{H}_4<N{F}_3<N{H}_3<H_{2}O$

2. $N{F}_3<C{H}_4<N{H}_3<H_{2}O$

3. $N{H}_3<N{F}_3<C{H}_4<H_{2}O$

4. $H_{2}O<N{H}_3<N{F}_3<C{H}_4$

Q. difference between intramolecular forceand intermolecular force

Q. which is more covalent and why (BeCl2 or LiCl) ?

Q. The correct decreasing order of dipole moments for the given molecules is:
$(B{F}_3,N{F}_3$ and $N{H}_3)$

1. $B{F}_3>N{F}_3>N{H}_3$
2. $N{F}_2>B{F}_3>N{H}_3$
3. $N{H}_3>N{F}_3>B{F}_3$
4. $N{H}_3>B{F}_3>N{F}_3$

Q.
The dipole moments of $o,p$ and m - dichlorobenzene will be in the order:

1. $o>p>m$
2. $p>o>m$
3. $m>o>p$
4. $o>m>p$

Q. The dipolemoment of H - Br molecule is $2.6\times {10}^{-30}$ coulomb.metre. Its bond length is $1.3\mathring{A}$ Then the percentage ionic character of H - Br bond is

1. 20%

2. 16%

3. 21.5%

4. 12.5%

Q. Which of the following molecules does not possess a permanent dipole moment?

1. $C{S}_2$
2. $S{O}_3^{2-}$
3. $H_{2}S$
4. $S{O}_2$

Q. KCl crystallised in the same type of lattice as does NaCl. Given that r(Na)/r(Cl) = 0.55 and r(K)/r(Cl) = 0.74. Calculate the ratio of side of unit cell of KCl to that of NaC

Q. The correct orientations of dipoles in pyrrole and pyridine is:

1. 
2. 
3. 
4. 

Q. Which among the following has the highest dipole moment?

1. $CC{l}_4$
2. $CHC{l}_3$
3. $C{H}_{2}C{l}_2$
4. $C{H}_{3}Cl$

Q. "The melting point of $LiCl$ is higher than $NaCl$."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

Q. Which of the following compounds is polar and has a central atom with $s{p}^3$ hybridisation?

1. $H_{2}C{O}_3$
2. $Si{F}_4$
3. $B{F}_3$
4. $HCl{O}_2$

Q. Find out incorrect order of the dipole moment among the following pairs of compound:

1. $N{H}_3>N{F}_3$
2. $\text{p-nitrophenol < o-nitrophenol}$
3. $C{H}_{3}Cl>C{H}_{2}C{l}_2$
4. $Si{F}_4<S{F}_4$

Q. London forcees