Worksheet Physical properties Halo

 Here are 10 multiple-choice questions (MCQs) on the physical properties of haloalkanes and haloarenes without answers:

1. Which of the following factors influences the boiling points of haloalkanes? a) Size of the halogen atom

b) Number of halogen atoms

c) Molecular weight of the compound

d) All of the above

2. Which of the following haloalkanes has the highest boiling point?

a) Chloromethane (CH₃Cl)

b) Bromomethane (CH₃Br)

c) Iodomethane (CH₃I)

d) Fluoromethane (CH₃F)

3. Haloalkanes are generally ___ in nature due to the presence of a polar C-X bond.

a) Polar

b) Non-polar

c) Amphoteric

d) Neutral

4. Which of the following has the least solubility in water?

a) Methyl chloride (CH₃Cl)

b) Ethyl chloride (C₂H₅Cl)

c) Propyl chloride (C₃H₇Cl)

d) Butyl chloride (C₄H₉Cl)

5. Why do haloalkanes have higher boiling points compared to alkanes of similar molecular mass?

a) Due to hydrogen bonding

b) Due to the presence of the halogen atom, which increases van der Waals forces

c) Due to weaker dipole-dipole interactions

d) Due to their solubility in water

6. Which of the following halogen atoms imparts the highest density to haloalkanes?

a) Fluorine

b) Chlorine

c) Bromine

d) Iodine

7. Haloarenes are generally less soluble in water because:

a) They are polar compounds

b) They are non-polar compounds

c) The aromatic ring is hydrophobic

d) The C-X bond is highly polar

8. The boiling points of haloarenes compared to haloalkanes of similar molecular weight are generally:

a) Lower

b) Higher

c) Same

d) None of the above

9. Which of the following is true about the melting and boiling points of haloarenes?

a) They decrease with increasing molecular size

b) They increase with the size of the halogen

c) They remain constant

d) They depend only on the solvent used

10. In terms of dipole moment, which of the following haloalkanes would have the highest value?

a) Chloromethane (CH₃Cl)

b) Bro

momethane (CH₃Br)

c) Iodomethane (CH₃I)

d) Fluoromethane (CH₃F)

Here are the answers for the 10 MCQs on the physical properties of haloalkanes and haloarenes:

1. Which of the following factors influences the boiling points of haloalkanes?

Answer: d) All of the above

2. Which of the following haloalkanes has the highest boiling point?

Answer: c) Iodomethane (CH₃I)

3. Haloalkanes are generally ___ in nature due to the presence of a polar C-X bond.

Answer: a) Polar

4. Which of the following has the least solubility in water?

Answer: d) Butyl chloride (C₄H₉Cl)

5. Why do haloalkanes have higher boiling points compared to alkanes of similar molecular mass?

Answer: b) Due to the presence of the halogen atom, which increases van der Waals forces

6. Which of the following halogen atoms imparts the highest density to haloalkanes?

Answer: d) Iodine

7. Haloarenes are generally less soluble in water because:

Answer: c) The aromatic ring is hydrophobic

8. The boiling points of haloarenes compared to haloalkanes of similar molecular weight are generally:

Answer: b) Higher

9. Which of the following is true about the melting and boiling points of haloarenes?

Answer: b) They increase with the size of the halogen

10. In terms of dipole moment, which of the following haloalkanes would have the highest val

ue?

Answer: d) Fluoromethane (CH₃F)