PYQ Vault
EbooksTutor

Day 274: JEE Mains Chemistry

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

  1. Question 1

    The p-Block Elements. Asked once: 2021 Paper 5 (same type asked 3 times) See all 3 of this type

    47
    Match List-I with List-II.
    List-I (Name of oxoacid)List-II (Oxidation state of P)
    (A)Hypophosphorous acid(i)+5
    (B)Orthophosphoric acid(ii)+4
    (C)Hypophosphoric acid(iii)+3
    (D)Orthophosphorous acid(iv)+2
    (v)+1
    Choose the correct answer from the options given below:

    Tap an option to check your answer.

  2. Question 2

    Solutions. Asked once: 27 Jun 2022 (same type asked 3 times) See all 3 of this type

    145
    A solution containing 2.5×10−3 kg2.5 \times10^{- 3}\text{ }kg of a solute dissolved in 75×10−3 kg75 \times10^{- 3}\text{ }kg of water boils at 373.535 KK. The molar mass of the solute is gmol −1gmol\ ^{- 1}. [nearest integer] (Given: Kb(H2O)=0.52 KKgK_{b}\left( H_{2}O \right)= 0.52\text{ }KKg mol−1mol^{- 1}, boiling point of water =373.15 K= 373.15\text{ }K )

  3. Question 3

    Chemical Thermodynamics. Asked once: 2021 Paper 23 (same type asked 3 times) See all 3 of this type

    42
    The incorrect expression among the following is:

    Tap an option to check your answer.

  4. Question 4

    Amines. Asked once: 2021 Paper 8 (same type asked 3 times) See all 3 of this type

    38
    Primary, secondary and tertiary amines can be separated using:

    Tap an option to check your answer.

  5. Question 5

    Chemical Thermodynamics. Asked once: 2021 Paper 17 (same type asked 3 times) See all 3 of this type

    52
    When 400 mL400\text{ }mL of 0.2MH2SO40.2MH_{2}SO_{4} solution is mixed with 600 mL600\text{ }mL of 0.1MNaOH0.1MNaOH solution, the increase in temperature of the final solution is ____\_\_\_\_ ×10−2 K\times10^{- 2}\text{ }K. (Round off to the nearest integer). [Use: H+(aq)+OH−(aq)→H2OH^{+}(aq) +OH^{-}(aq) \rightarrow H_{2}O :
     ΔrH=−57.1 kJ mol−1]\left. \ \Delta_{r}H = - 57.1\text{ }kJ{\text{ }mol}^{- 1} \right\rbrack
    Specific heat of H2O=4.18 J K−1 g−1H_{2}O = 4.18\text{ }J{\text{ }K}^{- 1}{\text{ }g}^{- 1} density of H2O=1.0 g cm−3H_{2}O = 1.0\text{ }g{\text{ }cm}^{- 3} Assume no change in volume of solution on mixing.