Tuesday, April 29, 2008

Organic Compounds - Question Set April 30 2008

1. Among the following, the most reactive alkyl halide is

a. C2H5F
b. C2H5Cl
c. C2H5Br
d. C2H5I

2. In CH3CH2OH, the bond that undergoes heterolytic cleavage most readily is

a. C-C
b. C-O
c. C-H
d. O-H

3. Aldehydes are the first oxidation products of

a. secondary alcohols
b. primary alcohols
c. tertiary alcohols
d. dihydric alcohols

4. Which of the following on reaction with toluene gives benzaldehyde

a. chromyl chloride
b. anhydrous aluminium chloride
c. alkaline potassium permanganate
d. neutral solution of potassium permanganate

5. acetone when heated concentrated HCl and amalgamated zinc gives

a. C2H6
b. C3H8

6. Function isomers of monocarboxylic acids

a. ethers
b. alcohols
c. esters
d. aldehydes and ketones

7. Strongest acid among the following carboxylic acids is

a. malonic acid
b. oxalic acid
c. succinic acid
d. adipic acid

8. Nitration of benzoic acid gives the major product

a. 2-nitrobenzoic acid
b. 2,4-dinitrobenzoic acid
c. 3-nitrobenzoic acid
d. 4-nitrobenzoic acid

9. Treatment of ammonia with excess of ethyl iodide will give

a. ethylamine
b. diethylamine
c. triethylamine
d. tetraethylammonium iodide

10. Reaction of benzaldehyde with alkali give

a. phenol + sodium bezoate
b. benzene + benzyl alcohol
c. benzyl alcohol + sodium benzoate
d. phenol + benzene

Monday, April 28, 2008

Questions on Hydrocarbons - Preparation and Properties

1. Which one of the following alkanes can be easily sulphonated?

a. isobutane b. n-butane

c. n-pentane d. n-hexane

2. Addition of HBr to 2 methyl-1-propene in the presence of hydrogen peroxide mainly forms -------------------

3. An alkene with the molecular formula C4H8 upon ozonolysis gives one mole of propanone and one mole of methanal. The alkene is --------------------.

4. An alkene on vigorous oxidation with KMnO4 gives only acetic acid. The alkene is --------------.

5. An alkene with molecular formula C6H12 on oxidation with hot KMnO4 solution gives only HOOC-(CH2)4-COOH. The alkene is

6. Hydrocarbons that give both electrophilic and nucleophilic addition reactions -------------.

7. Alkaline KMnO4 oxidation of ethyne gives --------------.

8. Toluene is prepared from benzene by -------------- reaction.

9. Which one of the following will undergo meta substitution on monochlorination?

a. ehtoxybenzene b. chlorobenzene
c. 2,2,3,3-tetramethylbutane d. n-butane

10. When propene is treated with HBr in the dark and in absenceof peroxide, the main product is ----------------------- .

11. If in the reaction of C6H5Y, the major product is m-isomer, the group Y is -------------.