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Day 476: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 9 Apr 2024

    51
    The heat of solution of anhydrous CuSO4CuSO_{4} and CuSO4⋅5H2OCuSO_{4}\cdot 5H_{2}O are −70 kJ mol−1- 70\text{ }kJ{\text{ }mol}^{- 1} and +12 kJ mol−1+ 12\text{ }kJ{\text{ }mol}^{- 1} respectively. The heat of hydration of CuSO4CuSO_{4} to CuSO4⋅5H2OCuSO_{4}\cdot 5H_{2}O is −x kJ-x\text{ }kJ. The value of xx is ________

  2. Question 2

    Classification of Elements and Periodicity. Asked once: 1 Feb 2024

    35
    In case of isoelectronic species the size of F−,NeF^{-},Ne and Na+Na^{+}is affected by:

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  3. Question 3

    Coordination Compounds. Asked once: 2021 Paper 9

    46
    Match List-I with List-II. Choose the most appropriate answer from the options given below:

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  4. Question 4

    Electrochemistry. Asked once: 13 Apr 2023

    145
    At 298 K298\text{ }K, the standard reduction potential for Cu2+/CuCu^{2 +}/Cu electrode is 0.34 V0.34\text{ }V. Given: KspCu(OH)2=1×10−20K_{sp}Cu(OH)_{2}= 1 \times10^{- 20} Take 2.303RTF=0.059 V\frac{2.303RT}{F}= 0.059\text{ }V The reduction potential at pH=14pH = 14 for the above couple is (−)x×10−2 V( - )x \times10^{- 2}\text{ }V. The value of xx is___

  5. Question 5

    Equilibrium. Asked once: 27 Jul 2022

    123
    The Plot of pHpH-metric titration of weak base NH4OHNH_{4}OH vs strong acid HClHCl looks like:

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