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Day 79: MHT-CET Chemistry

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

  1. Question 1

    Ionic Equilibria. Asked 3 times: 10 May 2023 S2, 13 Apr 2026 S2*, 20 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    9
    Calculate the pH of buffer solution containing 0.1M CH3COOH\mathrm{CH_3COOH} and 0.1 M CH3COONa\mathrm{CH_3COONa} [Ka=1.8×10−5][K_a = 1.8 \times 10^{-5}]

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  2. Question 2

    Some Basic Concepts of Chemistry. Asked 3 times: 26 Apr 2025 S2*, 18 Apr 2026 S2*, 20 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    1
    What is the number of molecules in 2.125 g of ammonia?

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  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. Asked 3 times: 14 May 2024 S1, 22 Apr 2025 S2, 19 Apr 2026 S2 See all 3 times it was asked

    44
    Identify the reagent used in following reaction. Benzoic acid→ΔReagentBenzoyl chloride+phosphorous oxychloride+Hydrogen chloride\text{Benzoic acid} \xrightarrow[\Delta]{\text{Reagent}} \text{Benzoyl chloride} + \text{phosphorous oxychloride} + \text{Hydrogen chloride}

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  4. Question 4

    Electrochemistry. Asked 3 times: 11 May 2023 S2*, 15 Apr 2026 S2*, 19 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    30
    What must be the molarity of BaCl2\mathrm{BaCl_2} solution to have molar conductivity 240 Ω−1cm2mol−1240\ \Omega^{-1}\mathrm{cm^2mol^{-1}} and conductivity 0.012 Ω−1cm−10.012\ \Omega^{-1}\mathrm{cm^{-1}} at 25 ∘C25\ ^\circ\mathrm{C} ?

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  5. Question 5

    Ionic Equilibria. Asked 3 times: 4 May 2023 S2*, 19 Apr 2025 S1*, 19 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    10
    Calculate the [H3O+][\mathrm{H_3O^+}] if pH of the solution is 4.254.25

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