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Preparation of phenol (cumene, diazonium salt, chlorobenzene, benzenesulphonic acid)

This type of question, asked 4 times: 26 Jul 2022, 25 Jan 2023, 23 Jan 2025, 4 Apr 2025. All 4 questions below, oldest first.

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  1. Question 1

    26 Jul 2022

    135
    Hydrolysis of which compound will give carbolic acid?

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  2. Question 2

    25 Jan 2023

    31
    In the cumene to phenol preparation in presence of air, the intermediate is

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  3. Question 3

    23 Jan 2025

    117
    Identify the products [A]\lbrack A\rbrack and [B]\lbrack B\rbrack, respectively in the following reaction : chlorobenzene →(ii) H+(i) NaOH, 623 K, 300 atm[A]→Na2Cr2O7H2SO4[B]\xrightarrow[(ii)\ H^{+}]{(i)\ NaOH,\ 623\ K,\ 300\ atm}\left\lbrack A \right\rbrack\underset{H_{2}SO_{4}}{\overset{Na_{2}Cr_{2}O_{7}}{\rightarrow}}\lbrack B\rbrack

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  4. Question 4

    4 Apr 2025

    38
    Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y). The compound Y is treated with zinc metal to produce compound (Z). Identify the structure of compound (Z) from the following option.

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