Aqueous 10% NaHCO3 solution is used as a reagent for identifying 'A'. Which of the following compounds yield 'A' on hydrolysis?
CH3COOC2H5
C2H5-COO-C2H5
CH3CHO
CH3CH2OH
A.
CH3COOC2H5
NaHCO3 is basic in nature so it is used in the identification of acid only. In the given compound only ester (CH3COOC2H5) on hydrolysis gives acid as
The heating of phenyl-methyl ethers with HI produces.
Ethyl chlorides
Iodobenzene
Phenol
Phenol
C.
Phenol
The acidic strength of the given compounds follows the order
I. CH3-CH=CH-COOH
II. CH3--CH=CH-COOH
III. CH3=CH2-COOH
II > III > I
III > II > I
II > I > III
I > II > III
D.
I > II > III
The correct order of the acidic strength in the given compounds is I > II > III.
Assertion : Phenol is more acidic than ethanol.
Reason : Phenoxide ion is resonance stabilised.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
Due to stabilised resonance of phenoxide ion, phenol is more acidic than ethanol.
Which one is the most acidic compound?
D.
–NO2 group has very strong –I & –R effects
The reaction,
C6H5ONa + CO2 +H2O C6H5OH + NaHCO3 suggests that
phenol is a stronger acid than carbonic acid
carbonic acid is a stronger acid than phenol
water is a stronger acid than phenol
None of these.
B.
carbonic acid is a stronger acid than phenol
Since a stronger acid displaces a weaker acid from its salts, therefore, carbonic acid(CO2 + H2O = H2CO3) is a stronger acid than phenol.
Which one is the correct order of acidity?
CH2= CH2> CH3– CH = CH2> CH3– C ≡ CH > CH ≡ CH
CH ≡ CH > CH3– C ≡ CH > CH2= CH2> CH3– CH3
CH ≡ CH > CH2= CH2> CH3– C ≡ CH >CH3– CH3
CH ≡ CH > CH2= CH2> CH3– C ≡ CH >CH3– CH3
B.
CH ≡ CH > CH3– C ≡ CH > CH2= CH2> CH3– CH3
In the above reaction, end product 'C' is
Salicylaldehyde
Salicyclic acid
Phenylacetate
Aspirin
D.
Aspirin