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Day 180: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 29 Jul 2022 (same type asked 3 times) See all 3 of this type

    143
    1.80 g1.80\text{ }g of solute A was dissolved in 62.5 cm362.5{\text{ }cm}^{3} of ethanol and freezing point of the solution was found to be 155.1 K155.1\text{ }K. The molar mass of solute AA is ____ g mol−1g{\text{ }mol}^{- 1}. [Given: Freezing point of ethanol is 156.0 K156.0\text{ }K. Density of ethanol is 0.80 g cm−30.80\text{ }g{\text{ }cm}^{- 3}. Freezing point depression constant of ethanol is 2.00 K kg mol−12.00\text{ }K\text{ }kg{\text{ }mol}^{- 1}]

  2. Question 2

    Chemical Thermodynamics. Asked once: 28 Jul 2022 (same type asked 3 times) See all 3 of this type

    32
    Which of the following relation is not correct?

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  3. Question 3

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

    137
    Which statement is NOT correct for p-toluenesulphonyl chloride?

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  4. Question 4

    Chemical Thermodynamics. Asked once: 2021 Paper 20 (same type asked 3 times) See all 3 of this type

    58
    200 mL200\text{ }mL of 0.2MHCl0.2MHCl is mixed with 300 mL300\text{ }mL of 0.1MNaOH0.1MNaOH. The molar heat of neutralization of this reaction is −57.1 kJ- 57.1\text{ }kJ. The increase in temperature in  ∘C\ ^{\circ}C of the system on mixing is x×10−2x \times10^{- 2}. The value of xx is ____\_\_\_\_. (Nearest integer) [Given: Specific heat of water =4.18 J g−1 K−1= 4.18\text{ }J{\text{ }g}^{- 1}{\text{ }K}^{- 1} Density of water  =1.00 g cm−3]\left. \ = 1.00\text{ }g{\text{ }cm}^{- 3} \right\rbrack (Assume no volume change on mixing)

  5. Question 5

    The d- and f-Block Elements. Asked once: 26 Jun 2022 (same type asked 3 times) See all 3 of this type

    129
    The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

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