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Day 311: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 2021 Paper 19 (same type asked 4 times) See all 4 of this type

    58
     83 g\ 83\text{ }g of ethylene glycol dissolved in 625 g625\text{ }g of water. The freezing point of the solution is ____ K. (Nearest integer) [Use: Molal Freezing point depression constant of water  =1.86 K kg mol−1]\left. \ = 1.86\text{ }K\text{ }kg{\text{ }mol}^{- 1} \right\rbrack Freezing Point of water =273 K= 273\text{ }K Atomic masses: C : 12.0u,O:16.0u,H:1.0u]12.0u,O:16.0u,H:1.0u\rbrack

  2. Question 2

    The d- and f-Block Elements. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    55
    The 'spin only' magnetic moment value of MO42−MO_{4}^{2-} is _____ BM. (Where MM is a metal having least metallic radii among ScSc, TiTi, VV, CrCr, MnMn and ZnZn). (Given atomic number: Sc=21Sc = 21, Ti=22Ti = 22, V=23V = 23, Cr=24Cr = 24, Mn=25Mn = 25 and Zn=30Zn = 30)

  3. Question 3

    Chemical Thermodynamics. Asked once: 28 Jun 2022 (same type asked 4 times) See all 4 of this type

    54
    4.0 L4.0\text{ }L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 20 L. The amount of heat absorbed in this expansion is ____\_\_\_\_ L atm.

  4. Question 4

    Equilibrium. Asked once: 28 Jul 2022 (same type asked 4 times) See all 4 of this type

    145
    At 600 K,2 mol600\text{ }K,2\text{ }mol of NONO are mixed with 1 mol1\text{ }mol of O2O_{2}.
    2NO(g)+O2( g)⇄2NO2( g)2NO_{(g)}+O_{2}(\text{ }g) \rightleftarrows 2NO_{2}(\text{ }g)
    The reaction occurring as above comes to equilibrium under a total pressure of 1 atm. Analysis of the system shows that 0.6 mol0.6\text{ }mol of oxygen are present at equilibrium. The equilibrium constant for the reaction is____ (Nearest integer).

  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 29 Jun 2022 (same type asked 4 times) See all 4 of this type

    149
    In the given reaction the number of sp2sp^{2} hybridised carbon (s) in compound ' XX ' is