571.

Assertion : Cyclohexanone exhibits keto-enol tautomerism.

Reason : In cyclohexanone, one form contains the keto group (>C=O) while other contains enolic group (- C=C- OH).

• 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 compound A ➔ C₅H₁₀Cl₂ on hydrolysis gives C₅H₁₀O which reacts with NH₂OH forms iodoform , but does not give Fehling test A is :

In photography , sodium thiosulphate is used as :

• complexing agent

• oxidising agent

• reducing agent

• none of these

Assertion : Benzaldehyde is more reactive than ethanal towards nucleophilic attack.

Reason : The overall effect of -I and +R effect of phenyl group decreases the electron density on the carbon of C=O atom  group in benzaldehyde.

• 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.

Assertion : Acetamide has more polar -CO group than in ethyl acetoacetate.

Reason : $\stackrel{..}{\mathrm{N}}$H₂ is more electron donating than $\stackrel{..}{\mathrm{O}}$C₂H₅.­

• 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.

Essential compound to manufacture acrolin is :

• glycerol

• benzene

• phenol

• ammonia

HCHO reacts with NH₃ togive :

• urotropine

• bakelite

• teryline

• gylaptal

Iodoform test is not given by :

• HCHO

• CH₃CHO

• CH₃COCH₃

• C₂H₅OH

Benedict's solution is not reduced by :

• formaldehyde

• acetaldehyde

• glucose

• acetic anhydride

Aldol condensation will not occur in :

• HCHO

• CH₃CH₂CHO

• CH₃COCH₃

• CH₃CHO