PYQ Vault

Day 3: MHT-CET Chemistry

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

  1. Question 1

    Chemical Thermodynamics and Energetics. This type asked 17 times: 1 in 2022, 5 in 2023, 2 in 2024, 4 in 2025, 5 in 2026. This one: 19 May 2026 S1 See all 17 of this type

    7
    A gas expands by 2500 cm32500\ \mathrm{cm^3} against constant external pressure 1.51.5 atm at constant temperature of 300300 K. Calculate the work of expansion in kJ.

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  2. Question 2

    Chemical Bonding and Molecular Structure. This type asked 16 times: 3 in 2023, 2 in 2024, 5 in 2025, 6 in 2026. This one: 19 May 2026 S2 See all 16 of this type

    4
    What is the shape of a molecule if it has two lone pairs and three bonding pairs of electrons?

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  3. Question 3

    Ionic Equilibria. This type asked 16 times: 6 in 2023, 4 in 2024, 2 in 2025, 4 in 2026. This one: 19 May 2026 S2 See all 16 of this type

    9
    What is the pH of a mixture of 4040 ml of 0.10.1 M Ba(HCOO)2\mathrm{Ba(HCOO)_2} and 2020 ml of 0.10.1 M HCOOH\mathrm{HCOOH} solution? (pKapK_a for formic acid =5= 5)

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  4. Question 4

    Chemical Kinetics. This type asked 16 times: 1 in 2021, 4 in 2023, 4 in 2024, 1 in 2025, 6 in 2026. This one: 14 May 2026 S1 See all 16 of this type

    25
    A first-order reaction takes 2020 minutes to reach 15%15\% completion. Calculate the rate constant of the reaction.

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  5. Question 5

    Chemical Kinetics. This type asked 16 times: 4 in 2023, 5 in 2024, 2 in 2025, 5 in 2026. This one: 13 May 2026 S1 See all 16 of this type

    26
    The rate of reaction, A+B→CA + B \rightarrow C is 3.6×10−2 mol dm−3 s−13.6 \times 10^{-2}\ \mathrm{mol\,dm^{-3}\,s^{-1}} when [A]=[B]=0.2 mol dm−3[A] = [B] = 0.2\ \mathrm{mol\,dm^{-3}}. Calculate the rate constant if the reaction is first order in A and second order in B.

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