Chemistry Test 22

Result

Chemistry Test 22

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following compounds does not undergo aldol condensation?

A
C₆H₅CH₂CHO

B
C₆H₅CHO

C
CH₃COCH₃

D
CH₃CH₂CHO

Solution

Benzaldehyde does not undergo aldol condensation.
Question 2
4 / -1

Arrange the following compounds in the reactivity order towards nucleophilic substitution reaction?

A
RCOCl> RCOOCOR> RCOOR> RCONH₂

B
RCONH₂> RCOOR> RCOOOR> RCOCl

C
RCOOR> RCONH₂> RCOCl> RCOOCOR

D
RCOOOR> RCOCl> RCONH₂> RCOOR

Solution

Ease of reactivity of different derivatives of carboxylic acid depends upon the leaving group ability of nucleophile.
Weaker the base better it is the leaving group (as anion). Thus, the leaving order is-
Cl⁻ > R-COO⁻ > R-O⁻ > ⁻NH₂
Hence, the correct order of reactivity is RCOCl > RCOOCOR > RCOOR > RCONH₂.
Question 3
4 / -1

Which of the following compound is expected to be most basic

A
Aniline

B
Methylamine

C
Hydroxylamine

D
Ethylamine

Solution

Due to +I effect of alkyl group, N-atom of amines acquires partial –ve charge and thus electron pair is easily donated.