Fri May 14, 2010 10:26 am
Important Questions from Haloalkanes and Haloarenes
(2). Give the structures of following.: 1x10=10
1. 1,3-Dichloro -2-(bromomethyl) propane
2. Isobutylchloride
3. Ortho bromotoluene
4. 1 – Bromo – 4 – chlorobutane
5. 3 – Bromo – 5 – chloro – 3,5 – dimethyloctane
6. 2,3 – Dibromo – 1 – chloro -3- methylpentane
7. 2 – Chloro – 3 – ethyl -1, 4- pentadieme
8. 2,3 – Dibromo – 1 – chloro -3- methylpentane
9. 2 – Chloro – 1 – phemylpropane
10. Tert – butylchloride
Convert
1. 1 - Butene to 1 — chlorobutane.
2. Ethene to ethanol.
3. Chlorobenzene to phenol.
4. Methyl bromide to acetic acid.
5. 2- chlorobutane to sec- butyl ethyl ether.
6. Chlorobenzene to benzyl chloride.
7. Chlorobenzene to Benzene.
8. Methane to Ethane.
9. Benzene to o- chlorotoluene.
10. 1- chloropropane to 2- iodopropane.
Topic:- Miscellaneous Questions
1. What is lucas reagent? [1]
2. Which of the following will show optical is omerism
1 – bromobutane or 2 – bromobutane? [1]
3. Arrange CH3 CH2 CH2 CH2 Br , (CH3) 3 C Br, CH3 CH (CH3) CH2 Br
in order of increasing boiling points. [1]
4. Give an example of [2]
(a) Fittig reaction
(b) Finkelstein reaction.
5. What happens when [2]
a) Thionyl chloride acts upon I - propanol.
b) Ethanol reacts with PBr3
6. How many aromatic isomers are possible for the formula C7 H7 Cl ?
Write the structure and names. [2]
7. How is chlorobenzene prepared by [2]
(a) direct chlorination
b) diazotization method?
8. How can we distinguish between an alkyl halide and aryl halide? [2]
Topic:- Reasoning Questions
Explain giving reasons:- (each question carries 2 marks)
1. Thionyl chloride is preferred for converting alcohol to haloalkane.
2. Phenol cannot be converted to chlorobenzene by reacting with HCl.
3. HNO3 is added during iodination of benzene.
4. p- dichlorobenzene has higher melting point than meta – dichlorobenzene.
5. The boiling points of isomeric haloalkenes decrease with increase in branching.
6. Hydrolysis of optically active 2- bromobutane forms optically inactive butan - 2 - ol.
7. Chlorobenzene is less reactive towards nucleophilic substitution reaction.
8. Chloroform is stored in dark coloured bottles.
9. The order of boiling points is RCl < RBr < RI.
10. Vinyl chloride is less reactive than allyl chloride.
1. 1,3-Dichloro -2-(bromomethyl) propane
2. Isobutylchloride
3. Ortho bromotoluene
4. 1 – Bromo – 4 – chlorobutane
5. 3 – Bromo – 5 – chloro – 3,5 – dimethyloctane
6. 2,3 – Dibromo – 1 – chloro -3- methylpentane
7. 2 – Chloro – 3 – ethyl -1, 4- pentadieme
8. 2,3 – Dibromo – 1 – chloro -3- methylpentane
9. 2 – Chloro – 1 – phemylpropane
10. Tert – butylchloride
Convert
1. 1 - Butene to 1 — chlorobutane.
2. Ethene to ethanol.
3. Chlorobenzene to phenol.
4. Methyl bromide to acetic acid.
5. 2- chlorobutane to sec- butyl ethyl ether.
6. Chlorobenzene to benzyl chloride.
7. Chlorobenzene to Benzene.
8. Methane to Ethane.
9. Benzene to o- chlorotoluene.
10. 1- chloropropane to 2- iodopropane.
Topic:- Miscellaneous Questions
1. What is lucas reagent? [1]
2. Which of the following will show optical is omerism
1 – bromobutane or 2 – bromobutane? [1]
3. Arrange CH3 CH2 CH2 CH2 Br , (CH3) 3 C Br, CH3 CH (CH3) CH2 Br
in order of increasing boiling points. [1]
4. Give an example of [2]
(a) Fittig reaction
(b) Finkelstein reaction.
5. What happens when [2]
a) Thionyl chloride acts upon I - propanol.
b) Ethanol reacts with PBr3
6. How many aromatic isomers are possible for the formula C7 H7 Cl ?
Write the structure and names. [2]
7. How is chlorobenzene prepared by [2]
(a) direct chlorination
b) diazotization method?
8. How can we distinguish between an alkyl halide and aryl halide? [2]
Topic:- Reasoning Questions
Explain giving reasons:- (each question carries 2 marks)
1. Thionyl chloride is preferred for converting alcohol to haloalkane.
2. Phenol cannot be converted to chlorobenzene by reacting with HCl.
3. HNO3 is added during iodination of benzene.
4. p- dichlorobenzene has higher melting point than meta – dichlorobenzene.
5. The boiling points of isomeric haloalkenes decrease with increase in branching.
6. Hydrolysis of optically active 2- bromobutane forms optically inactive butan - 2 - ol.
7. Chlorobenzene is less reactive towards nucleophilic substitution reaction.
8. Chloroform is stored in dark coloured bottles.
9. The order of boiling points is RCl < RBr < RI.
10. Vinyl chloride is less reactive than allyl chloride.