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JEE Mains | PYQ

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

In the Claisen-Schmidt reaction to prepare, dibenzalacetone from \( 5.3 \, \mathrm{g} \) of benzaldehyde, a total of \( 3.51 \, \mathrm{g} \) of product was obtained. The percentage yield in this reaction was ________

The product \( (P) \) formed in the following reaction is:

Given below are two statements:
Statement I: Fructose does not contain an aldehydic group but still reduces Tollen's reagent.
Statement II: In the presence of base, fructose undergoes rearrangement to give glucose.
In the light of the above statements, choose the correct answer from the options given below

Which among the following compounds give yellow solid when reacted with \( \mathrm{NaOI}/\mathrm{NaOH} \)?


Choose the correct from the options given below:

A molecule (“P”) on treatment with acid undergoes rearrangement and gives (“Q”). (“Q”) on ozonolysis followed by reflux under alkaline condition gives (“R”). The structure of (“R”) is given below:

The structure of (“P”) is:

When  undergoes intramolecular aldol condensation, the major product formed is:

“P” is an optically active compound with molecular formula \( \mathrm{C_6H_{12}O} \). When “P” treated with \( 2,4 \)-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, “P” gives a negative test.
Predict the structure of “P”

Match List-I with List-II.

Choose the correct answer from the options given below :

The major product \( (P) \) in the following reaction is:

Residue \( (A) + \mathrm{HCl{(dil)}} \rightarrow \) Compound \( (B) \)
Structure of residue \( (A) \) and compound \( (B) \) formed respectively is:

Aman has been asked to synthesise the molecule \( (x) \). He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare “\( x \)”. Predict the suitable alkene that can lead to the formation of “\( x \)”.

Given below are two statements:
Statement (I): On nitration of m-xylene with \( \mathrm{HNO_3} , \mathrm{H_2SO_4} \), followed by oxidation, \( 4 \)-nitrobenzene-\( 1, 3 \)-dicarboxylic acid is obtained as the major product.
Statement (II): \( -\mathrm{CH_3} \) group is o/p-directing while \( -\mathrm{NO_2} \) group is m-directing group.
In the light of the above statements, choose the correct answer from the options given below:

The compounds which give positive Fehling’s test are:

Choose the correct answer from the options given below: