PYQ Vault

Day 432: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 4 Apr 2025

    112
    Consider the given data : (a) HCl(g)+10H2O(l)→HCl⋅10H2OHCl(g) + 10H_{2}O(l) \rightarrow HCl \cdot 10H_{2}O
    ΔH=−69.01 kJ mol−1\Delta H = - 69.01\text{ }kJ{\text{ }mol}^{- 1}
    (b) HCl(g)+40H2O(l)→HCl.40H2OHCl(g) + 40H_{2}O(l) \rightarrow HCl.40H_{2}O
    ΔH=−72.79 kJ mol−1\Delta H = - 72.79\text{ }kJ{\text{ }mol}^{- 1}
    Choose the correct statement :

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 29 Jan 2025

    118
    The type of oxide formed by the element among Li,Na,Be,Mg,BLi,Na,Be,Mg,B and Al that has the least atomic radius is :

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  3. Question 3

    Coordination Compounds. Asked once: 1 Feb 2023

    42
    Which of the following are the example of double salt? (A) FeSO4⋅(NH4)2SO4⋅6H2OFeSO_{4}\cdot\left( NH_{4} \right)_{2}SO_{4}\cdot 6H_{2}O (B) CuSO4⋅4NH3⋅H2OCuSO_{4}\cdot 4NH_{3}\cdot H_{2}O (C) K2SO4⋅Al2(SO4)3⋅24H2OK_{2}SO_{4}\cdot Al_{2}\left( SO_{4} \right)_{3}\cdot 24H_{2}O (D) Fe(CN)2⋅4KCNFe(CN)_{2}\cdot 4KCN Choose the correct answer

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  4. Question 4

    Electrochemistry. Asked once: 9 Apr 2024

    31
    The molar conductivity for electrolytes A and B are plotted against C1/2C^{1/2} as shown below. Electrolytes A and B, respectively, are:

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  5. Question 5

    Equilibrium. Asked once: 5 Apr 2024

    126
    Given below are two statements: Statement I: On passing HCl(g)HCl_{(g)} through a saturated solution of BaCl2BaCl_{2}, at room temperature white turbidity appears. Statement II: When HClHCl gas is passed through a saturated solution of NaClNaCl, sodium chloride is precipitated due to common ion effect. In the light of the above statements, choose the most appropriate answer from the options given below:

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