Sour taste of lemon is due to the presence of:

• citric acid

• acetic acid

• oxalic acid

• None of these

Vinegar is a solution of acetic acid which is:

• 15-20%

• 20-25%

• 6-8%

• 2-4%

In the reaction : ${\mathrm{CH}}_3\mathrm{OH} \stackrel{\mathrm{Oxidation}}{\to } \mathrm{A} \stackrel{{\mathrm{NH}}_3}{\to }\mathrm{B}$; A and B are

• HCHO, HCOONH₄

• HCOOH, HCOONH₄

• HCOOH, HCONH₂

• HCHO, HCONH₂

The reactant (X) in the following reaction is-

(X) $\underset{({\mathrm{CH}}_3\mathrm{CO}{)}_2\mathrm{O}}{\overset{{\mathrm{CH}}_3\mathrm{COONa}}{\to }}$ Cinnamic acid 

A compound (X) on ozonolysis followed by reduction gives an aldehyde C₂H₄O and 2-butanone, compound (X) is

• 3-methyl pentene-2

• 3-methyl pentene-3

• 3-methyl hexene-3

• 3-ethyl pentene-3

346.

Cross aldol condensation occurs between

• two same aldehydes

• two same ketones

• two different aldehydes and ketones

• None of the above

Cannizaro reaction is performed by

• formaldehyde

• Formaldehyde and acetaldehyde

• benzaldehyde

• formaldehyde and benzaldehyde

Which of the following, is an example of aldol condensation?

• 2CH₃COCH₃ $\stackrel{\mathrm{dil}. \mathrm{NaOH}}{\to }$ CH₃COHCH₃CH₂COCH₃

• 2HCHO $\stackrel{\mathrm{dil}. \mathrm{NaOH}}{\to }$ CH₃OH

• C₆H₅CHO + HCHO $\stackrel{\mathrm{dil}. \mathrm{NaOH}}{\to }$ C₆H₅CH₂OH

• None of the above

Main product obtained from the reaction of ammonia and formaldehyde is

• formic acid

• methylamine

• methanol

• urotropine

The property which distinguishes formic acid from acetic acid is

• only ammonium salt of formic acid on heating gives amide

• when heated with alcohol/ H₂SO₄ only acetic acid forms ester

• only acetic acid forms salts with alkali

• only formic acid reduces Fehling's solution