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Standard XII
Chemistry
Cross Aldol Condensation
Question

CH3CHO+HCHODil.NaOH⟶HeatAHCN⟶H3O+B. The structure of the compound B is:
  1. CH2=CH−CH|OH−COOH
  2. CH2=CH−CH|CN−OH
  3. CH3−CH2−CH|CN−OH
  4. CH3−CN|CH|Cl−COOH

A
CH2=CH−CH|OH−COOH
B
CH2=CH−CH|CN−OH
C
CH3−CH2−CH|CN−OH
D
CH3−CN|CH|Cl−COOH
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Solution
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The option (A) represents the compound (B).

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Similar Questions
Q1
Write IUPAC names of the following

@CH3-CH2-CH=CH2
@CH3-CH2-CH2-C(CH3)2-CH3
@CH3-CH2-CHO
@CH3-CH(OH)-CH3
@CH3-CH2-CH2-COOH
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Q2
Which is the most suitable reagent for the following transformation?

CH3−CH=CH−CH2−OH|CH−CH3⟶CH3−CH=CH−CH2−COOH

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Q3
Identify the type of the following reaction of carbon compounds.
a. CH3 -CH2 -CH2-OH → CH3 -CH2 -COOH
b. CH3 -CH2 -CH3 → 3CO2 + 4H2O
c. CH3 -CH = CH -CH3 + Br2 → CH3 -CHBr - CHBr -CH3
d. CH3 -CH3 + Cl2 → CH3 -CH2 -Cl + HCl
e. CH3 -CH2 -CH2 -CH2 -OH → CH3 -CH2 -CH=CH2 + H2O
f. CH3 -CH2 -COOH + NaOH → CH3 -CH2 -COO - Na+ + H2O
g. CH3 -COOH + CH3 -OH → CH3 -COO- CH3 + H2O
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Q4
Find out the order of stability between (A) CH3−CH2−C|COOHH−−CH−CH3
(B) CH3−C|COOHH−CH2−−CH−CH3
(C) C|COOHH2−CH2−CH2−−CH−CH3
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Q5
Which is the stronger acid in each of the following pairs?
(i) CH3−COOH and CH2=CH−COOH
(ii) C6H5−COOH and C6H5−CH2−COOH
(iii) CH3−CH2−COOH and CH3−CH|OH−COOH.
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