Aldehydes and Ketones Quiz-6
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Q1. Aldol condensation is given by
Solution
Aldol condensation is given by acetaldehyde due to the presence of α-hydrogen atom.
Aldol condensation is given by acetaldehyde due to the presence of α-hydrogen atom.
Q2.Dry distillation of calcium formate and subsequent treatment with conc KOH gives the mixture of
-
-
-
- None of these
Solution
Q3. 
and
can be distinguished chemically by:
and
can be distinguished chemically by:
Solution
Iodoform test
Iodoform test
Q4.
A is?
Solution
Acetone
undergoes condensation reaction in presence of HCl to produce mesityl oxide.
Acetone
undergoes condensation reaction in presence of HCl to produce mesityl oxide.
Q5.Mild oxidation of carboxylic acids occurs at…….position.
Solution
Q6. Oxalic acid when reduced with zinc and
gives
gives
Solution
Oxalic acid is reduced by Zn andto give glycolic acid
Oxalic acid is reduced by Zn and
to give glycolic acid 
Q7.Which would undergo aldol condensation?
Solution
Q8.The strongest acid amongst the following compounds is
Solution
Electron withdrawing group (-I effect) stabilizes the anion, and thus increases acidic nature. Thus (c), (d)> (a), (b) acidic Farther the electron withdrawing group from the –COOH group, its effect in increasing acid strength decreases thus (c) with Cl at α−position is stronger than (d) with Cl at γ−position.
Electron withdrawing group (-I effect) stabilizes the anion, and thus increases acidic nature. Thus (c), (d)> (a), (b) acidic Farther the electron withdrawing group from the –COOH group, its effect in increasing acid strength decreases thus (c) with Cl at α−position is stronger than (d) with Cl at γ−position.
Q9.Which of the following reactions can be used to change benzaldehyde to cinnamic acid?
Solution
When benzaldehyde is heated with acetic anhydride in the presence of sodium acetate, condensation product is obtained which on hydrolysis give α,β−unsaturated acid (such as cinnamic acid) and the reaction is known as Perkin’s reaction.
When benzaldehyde is heated with acetic anhydride in the presence of sodium acetate, condensation product is obtained which on hydrolysis give α,β−unsaturated acid (such as cinnamic acid) and the reaction is known as Perkin’s reaction.
Q10.
Identify the final product X
Solution
Formation of α,β-unsaturated carboxylic acid by the action of acetic anhydride and sodium acetate on aromatic aldehyde as Perkin reaction. The other Perkin like condensation involve condensation of aromatic aldehyde and α-hydrogen containing compound
Formation of α,β-unsaturated carboxylic acid by the action of acetic anhydride and sodium acetate on aromatic aldehyde as Perkin reaction. The other Perkin like condensation involve condensation of aromatic aldehyde and α-hydrogen containing compound
