PYQ Vault

Day 208: MHT-CET Chemistry

5 questions. Try each one first, then open its answer.

  1. Question 1

    Electrochemistry. Asked once: 17 Apr 2026 S2 (same type asked 6 times) See all 6 of this type

    25
    What is the change in oxidation number of Pb at positive electrode of lead accumulator acting as galvanic cell ?

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  2. Question 2

    Redox Reactions. Asked once: 19 Apr 2026 S1 (same type asked 6 times) See all 6 of this type

    13
    Identify change in oxidation state of oxidising agent in following redox reaction. 3H3AsO3(aq)+BrO3(aq)−⟶Br(aq)−+3H3AsO4(aq)\mathrm{3H_3AsO_{3(aq)} + BrO^-_{3(aq)} \longrightarrow Br^-_{(aq)} + 3H_3AsO_{4(aq)}}

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  3. Question 3

    Halogen Derivatives of Alkanes. Asked once: 19 Apr 2025 S2 (same type asked 6 times) See all 6 of this type

    73
    Which among the following is an allylic halide?

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  4. Question 4

    Green Chemistry and Nanochemistry. Asked once: 25 Apr 2025 S1 (same type asked 6 times) See all 6 of this type

    66
    Calculate percentage atom economy when 46 g ethanol is obtained from 64.5 g chloroethane and 6 gKOH(aq)6\text{ }gKOH_{(aq)}.

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  5. Question 5

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 17 Apr 2026 S2 (same type asked 6 times) See all 6 of this type

    42
    Identify the main product of following reaction R−C∥O−O−R′→H3O+DIBAL−HProduct\mathrm{R{-}\overset{\displaystyle O}{\overset{\|}{C}}{-}O{-}R' \xrightarrow[\mathrm{H_3O^+}]{\mathrm{DIBAL{-}H}} Product}

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