PREVIOUS YEARS BOARD EXAM QUESTIONS
Q:1 How will you account for the following:
1. Chloroacetic acid is stronger acid than acetic acid .
2. In the preparation of ester by the reaction of carboxylic acid an alcohol, the ester
formed is distilled as fast as it is formed.
3. Carboxylic acids have higher boiling points than alcohols of comparable molecular
masses.Explain.
(A.I.S.B.E 2000)
Q:2 Write reactions and conditions for the following conversion:
1: Toluene to benzaldehyde
2: Acetic acid to ethylamine.
(A.I.S.B.E 2001)
Q:3 State one test to distinguish between :
Aqueous solution of phenol and benzoic acid.
(D.S.B.E2002)
Q:4 Give reason for the following:
Most aromatic acids are solids while acetic acid and others of this series are liquids.
(D.S.B.E.2002)
Q:5 (a) Write the complete reaction for the conversion of benzoic acid to 3-bromobenzoic acid.
(b) How will you account for the following :
Chloro acetic acid is a stronger acid than acetic acid.
(A.I.S.B.E. 2002)
Q:6 Complete the following reaction :
p
(a)CH3COOH + 6HI -------------
CCl4
(b)CH3COOHAg + Br2 --------------
(H.P.S.B.2004)
Q:7 How will you convert
1:Acetic acid to glycine
2:Acetylene to acetic acid
3: Benzoyl chloride to benzaldehyde
4:Acetic acid to acetaldehyde
(Pb.S.B. 2004)
Q:8 How will you convert
1: Acetic acid to methylamine
2: Acetic acid to acetaldehyde
(
Pb.S.B. 2004)
Q:9 Give chemical tests to distinguish between the following pairs of compounds
1: Phenol and benzoic acid
2: Propanol and propanone
3: Diethyl ether and propanol.
(A.I.S.B.E 2004)
Q:10 Write the reaction with condition to bring about the following conversions:
1: Benzoic acid to benzoyl chloride
2: Propionic acid to lactic acid
(Haryana.S.B.E.2004)
Q:11 (a) Why is acetic acid stronger acid than phenol?
(b) What happen when sodium salicylate is heated with
CaO and NaOH?
(H.P.S.B.2005)
Q:12 (a) p-benzoic acid stronger than benzoic acid.justify.
(b)Benzoic acid is stronger acid than acetic acid .justify.
(c) Carboxylic acids donot give characteristic reactions of carbonyl compounds.Explain.
(d) Chloro acetic acid is stronger acid than acetic acid .Explain.
(e) Formic acid is stronger acid than acetis acid .justify..
(Pb..S.B.E.2005)
Q:13 (a) Write the structural formula of hex-2-en-4-ynoic acid.
(b) To illustrate the following reactions write one chemical equation for each:
1: Cross aldol condensation reaction .
2: Hoffmann bromamide reaction.
(A.I.S.B.E.2005)
Q:14 (a) How will you convert propionic acid to acetic acid?
(b) What makes acetic acid stronger acid than phenols?
(c)How will you convert acetic acid in to acetaldehyde?
(d)What makes ehanoic acid stronger acid than ethanol?
(H.P.S.B.E. 2007)
Q:15 (a) Fluoroacetic acid is stronger than chloroacetic acid.Justify.
(b) Chloroacetic acid is stronger acid than acetic acid.Justify.
(c) Benzoic acid is stronger acid than acetis acid than acetic acid .justify.
(Pb.S.B.E.2005)
Q:16 (a) Write esterification reactin of carboxylic acids.
(b) Write hunsdiecker reaction.
(c) Carboxylic acids donot give characteristic reactions of
carbonyl group. Justify.
(Pb.S.B.E.2008)
Q:17 (a) Write short notes on :1) Transesterification
2) Hell volhard zelinsky (HVZ)reaction.
(b) What happens when malonic acid is decarboxylated?
(c) Write the IUPAC name of succinic acid .
(H.P.S.B.2008)
Q:18 State reasons for the following :
1: Monochloroacetic acid has a higher pKa value than dichloroacetic acid.
2: Ethanoic acid is a weaker acid than benzoic acid.
(D.S.B.E.2005)