Explore topic-wise MCQs in Organic Chemistry.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following statements is wrong?

A. The base-catalysed α-halogenation of propanone is first order in the concentration of the base
B. The rate constant for the base-catalysed α-halogenation of propanone decreases in the order Cl2 > Br2 > I2
C. The base-catalysed α-halogenation of propanone proceeds easily to give 1,1,1-trihalopropanone
D. Polyhalogenation of propanone is difficult under acidic conditions, but the products are the same as those obtained under basic conditions
Answer» C. The base-catalysed α-halogenation of propanone proceeds easily to give 1,1,1-trihalopropanone
Discussion
2.

A malonic ester synthesis of a carboxylic acid proceeds by alkylation of the enolate of the malonic ester followed by ester hydrolysis and decarboxylation of the β-dicarboxylic acid. Which of the following carboxylic acids is difficult to prepare by this method?

A. PhCH2CH2CO2H
B. (CH3)2CHO2H
C. PhCH2CO2H
Answer» D.
Discussion
3.

Which of the following statements is wrong?$

A. The base-catalysed α-halogenation of propanone is first order in the concentration of the base
B. The rate constant for the base-catalysed α-halogenation of propanone decreases in the order Cl<sub>2</sub> > Br<sub>2</sub> > I<sub>2</sub>
C. The base-catalysed α-halogenation of propanone proceeds easily to give 1,1,1-trihalopropanone
D. Polyhalogenation of propanone is difficult under acidic conditions, but the products are the same as those obtained under basic conditions
Answer» C. The base-catalysed ‚âà√≠¬¨¬±-halogenation of propanone proceeds easily to give 1,1,1-trihalopropanone
Discussion