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Day 400: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 2 Apr 2026 S1

    50
    At the transition temperature T,A⇌BT,A \rightleftharpoons B and ΔG0=105−35log⁡ T\Delta G^{0} = 105 - 35\log\text{ }T where A and B are two states of substance X . The transition temperature in  ∘C\ ^{\circ}C when pressure is 1 atm is ____\_\_\_\_ . (Nearest integer)

  2. Question 2

    Classification of Elements and Periodicity. Asked once: 5 Apr 2026 S1

    33
    Statement I : The correct order of electronegativity of fluorine, oxygen nitrogen is F>O>NF > O > N. Statement II : The oxidation state of oxygen in OF2{OF}_{2} is +2 and in Na2O{Na}_{2}O is -2 . In the light of the above statements, choose the correct answer from the options given below

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  3. Question 3

    Coordination Compounds. Asked once: 9 Apr 2024

    128
    The coordination environment of Ca2+Ca^{2 +} ion in its complex with EDTA4−EDTA^{4 -} is:

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  4. Question 4

    Electrochemistry. Asked once: 23 Jan 2026 S2

    28
    Consider the above electrochemical cell where a metal electrode (M) is undergoing redox reaction by forming M+(M→M++e)M^{+}\left( M \rightarrow M^{+}+ e \right). The cation M+M^{+}is present in two different concentrations c1c_{1} and c2c_{2} as shown above. Which of the following statement is correct for generating a positive cell potential?

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  5. Question 5

    Equilibrium. Asked once: 28 Jan 2025

    30
    A weak acid HA has degree of dissociation xx. Which option gives the correct expression of (pH−pKa)(pH - pK_{a}) ?

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