Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard XII
Chemistry
Acidity of Carboxylic Acids
Question

Which of the organic products of the following reactions has the least boiling point?
  1. CH3−CH2−COOHLiAlH4−−−−→H2O
  2. CH3−C∥O−CH3LiBH4−−−−→H2O
  3. CH3−CH2−CHOLiBH4−−−−→H2O
  4. CH3−CH=CH2(BH3)2−−−−−−−→H2O2,OH−

A
CH3−CH2−COOHLiAlH4−−−−→H2O
B
CH3−C∥O−CH3LiBH4−−−−→H2O
C
CH3−CH=CH2(BH3)2−−−−−−−→H2O2,OH−
D
CH3−CH2−CHOLiBH4−−−−→H2O
Open in App
Solution
Verified by Toppr

In option A, the product formed is the primary alcohol because LiAlH4 reduces the carbonyl bond only.

CH3−CH2−C∥O−OHLiAlH4−−−−→H2OCH3−CH2−CH2OH1o alcohol

The organic product of the reaction of option (B) has the least boiling point.
In reaction of option (B), a secondary alcohol is obtained. In all the remaining reactions, a primary alcohol is obtained.
The boiling point of alcohol decreases with increase in branching. Thus, 2− propanal has lower boiling point than 1− propanal.
CH3−C∥O−CH3LiBH4−−−−→H2OCH3−C|OHH−CH3

(C) CH3−CH2−CHOLiBH4−−−−→H2OCH3−CH2−CH2OH1o alcohol


In option D, the product formed is the primary alcohol because hydroboration of terminal alkene forms primary alkene the carbonyl bond only.

CH3−CH=CH2(BH3)2−−−−−−−→H2O2,OH−CH3−CH2−CH2OH1o alcohol

Boiling point order of alcohols are-

Was this answer helpful?
0
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
View Solution
Q2
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
View Solution
Q3
Which of the following is the correct increasing order of boiling point of the following compounds?
I) CH3−CH2−CH2−OH
II) CH3−CH|OH−CH3
III) CH3−O−CH2−CH3

View Solution
Q4
i)CH3−CH2−CH3|CH−CH2−O=CH2−CH3
ii)CH3−CH2−CH2−O−CH3|C|CH3−CH3

Give the major products that are formed by heating each of the following ethers with HI.
878588_7b9e87cceb9749fbbd4489edc1e8a262.png
View Solution
Q5
Which of the following reaction is example of SN2 reaction using conc. HCl:
(a) CH3−CH2−OHAnhyZnCl2/△−−−−−−−−−→CH3−CH2−Cl

(b) CH3−CH3|C|CH3−CH2OHAnhyZnCl2/△−−−−−−−−−→CH3−CH1|C|CH3−CH2−CH3

(c) CH3−OH|C|CH3−CH3AnhyZnCl2/△−−−−−−−−−→CH3−Cl|C|CH3−CH3

(d) CH2=CH−CH2−OHAnhyZnCl2/△−−−−−−−−−→CH2=CH−CH2−Cl

View Solution