JEE Chemistry - MCQ Practice Questions

Which of the following compounds will show optical isomerism?

The decarboxylation of malonic acid derivatives proceeds through:

In the crossed Cannizzaro reaction, the aldehyde that acts as both reducing and oxidizing agent is:

The rearrangement that occurs during the dehydration of 3-methylbutan-2-ol under acidic conditions is:

The mechanism of the esterification reaction between a carboxylic acid and alcohol is:

When propyne undergoes hydration in the presence of Hg2+/H2SO4, the major product is:

In the reduction of ketones and aldehydes using DIBAL-H, the product is:

The directing effect of the amino group (-NH2) in electrophilic aromatic substitution is:

In the Robinson annulation reaction, the product formed is:

The enolate ion formed from a ketone in basic conditions attacks an alkyl halide in the:

Which of the following compounds undergoes SN1 reaction most readily?

In the Friedel-Crafts alkylation of benzene with 1-chloropropane and AlCl3, the major product is isopropylbenzene due to:

Which reagent is used to differentiate between aldehydes and ketones?

The pKa of phenol (C6H5OH) is approximately 10, while that of aliphatic alcohol is around 16. This difference is due to:

Which of the following compounds will not give a positive Iodoform test?

In the bromination of toluene, the ortho:para ratio is approximately 2:1 instead of 1:1 due to:

The oxidation of primary alcohols with chromic acid (H2CrO4) in acidic medium gives:

Which mechanism best describes the addition of HBr to propene?

In the nitration of anisole (C6H5-O-CH3), the major product is:

The reaction of acetyl chloride with aniline preferentially gives N-acetylaniline rather than p-acetylaniline because: