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Day 273: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 26 Jul 2022 (same type asked 3 times) See all 3 of this type

    140
    Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Phenolphthalein is a pHpH dependent indicator, remains colourless in acidic solution and gives pink colour in basic medium Reason R: Phenolphthalein is a weak acid. It doesn't dissociate in basic medium. In the light of the above statements, choose the most appropriate answer from the options given below:

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  2. Question 2

    Equilibrium. Asked once: 2021 Paper 24 (same type asked 3 times) See all 3 of this type

    52
    The molar solubility of Zn(OH)2Zn(OH)_{2} in 0.1MNaOH0.1MNaOH solution is x×10−18Mx\times10^{- 18}M. The value of xx is (Nearest integer) (Given: The solubility product of Zn(OH)2Zn(OH)_{2} is  2×10−20)\left. \ 2 \times10^{- 20} \right)

  3. Question 3

    Haloalkanes and Haloarenes. Asked once: 2021 Paper 2 (same type asked 3 times) See all 3 of this type

    31
    The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is: (i) chlorobenzene (ii) 1-chloro-4-nitrobenzene (iii) 1-chloro-2,4-dinitrobenzene (iv) 2-chloro-1,3,5-trinitrobenzene

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  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 25 (same type asked 3 times) See all 3 of this type

    54
    The number of significant figures in 50000.020×10−350000.020 \times10^{- 3} is

  5. Question 5

    Equilibrium. Asked once: 2021 Paper 18 (same type asked 3 times) See all 3 of this type

    41
    Given below are two statements. Statement I: In the titration between strong acid and weak base methyl orange is suitable as an indicator. Statement II: For titration of acetic acid with NaOHNaOH phenolphthalein is not a suitable indicator. In the light of the above statements, choose the most appropriate answer from the options given below:

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