JEE Chemistry - MCQ Practice Questions

In Friedel-Crafts alkylation, the reactivity of alkyl halides follows:

Which of the following will give a positive iodoform test?

The compound that will undergo decarboxylation easily is:

A compound with molecular formula C6H12O shows a broad O-H stretch in IR at 3300 cm⁻¹ and no C=O peak. The 1H-NMR shows a singlet at δ 3.3 ppm. The compound is likely:

In the hydroboration-oxidation of alkenes, the reaction is stereospecific because:

A compound C5H10O2 with no C=O in IR but shows broad O-H stretch. 1H-NMR exhibits signals at δ 3.8 and δ 4.7 ppm. The compound is most likely:

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:

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

The order of reactivity in electrophilic aromatic substitution for halogens is:

In the acetoacetic ester synthesis, the initial condensation is between acetoacetic ester and alkyl halide in the presence of:

Which intermediate is formed when acetyl chloride reacts with benzene in the presence of AlCl₃?