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Identify two carbonyl compounds from their preparations, then their aldol product

This type of question, asked 3 times: 23 Jan 2026 S1, 6 Apr 2026 S2, 8 Apr 2026 S2. All 3 questions below, oldest first.

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  1. Question 1

    23 Jan 2026 S1

    31
    ' xx ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' yy ' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrolysis. From the following, which product is not obtained when one mole of ' xx ' and one mole of ' y ' react with each other in the presence of alkali followed by heating?

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  2. Question 2

    6 Apr 2026 S2

    39
    ' x ' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K . ' y ' is the product which is obtained by the reaction of ethane nitrile with methyl magnesium bromide in dry ether followed by hydrolysis. IUPAC name of product obtained from ' x ' and ' y ' in the presence of barium hydroxide followed by heating is:

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  3. Question 3

    8 Apr 2026 S2

    47
    ' x ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' y ' is the major product obtained from the benzene by reacting it with ethanoyl chloride in the presence of anhydrous AlCl3{AlCl}_{3}. Product (major) obtained by heating x and y in the presence of alkali is z . Total number of π\pi (pi) electrons in z is ____\_\_\_\_ .