PYQ Vault
EbooksTutor

Day 244: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 27 Jul 2022 (same type asked 4 times) See all 4 of this type

    143
    A gas (Molar mass =280 g mol−1= 280\text{ }g{\text{ }mol}^{- 1} ) was burnt in excess O2O_{2} in a constant volume calorimeter and during combustion the temperature of calorimeter increased from 298.0 K298.0\text{ }K to 298.45 K298.45\text{ }K. If the heat capacity of calorimeter is 2.5 kJ K−12.5\text{ }kJ{\text{ }K}^{- 1} and enthalpy of combustion of gas is 9 kJ mol−19\text{ }kJ{\text{ }mol}^{- 1} then amount of gas burnt is ____\_\_\_\_ g. (Nearest Integer)

  2. Question 2

    Coordination Compounds. Asked once: 29 Jan 2023 (same type asked 4 times) See all 4 of this type

    43
    Chiral complex from the following is: Here en == ethylene diamine

    Tap an option to check your answer.

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 30 Jan 2023 (same type asked 4 times) See all 4 of this type

    35
    What is the correct order of acidity of the protons marked A-D in the given compounds?

    Tap an option to check your answer.

  4. Question 4

    Solutions. Asked once: 2021 Paper 21 (same type asked 4 times) See all 4 of this type

    55
    40 g40\text{ }g of glucose (Molar mass =180)= 180) is mixed with 200 mL200\text{ }mL of water. The freezing point of solution is ____ K. (Nearest integer) [Given: Kf=1.86 K kg mol−1K_{f}= 1.86\text{ }K\text{ }kg{\text{ }mol}^{- 1}; Density of water == 1.00 g cm−3;1.00\text{ }g{\text{ }cm}^{- 3}; Freezing point of water  =273.15 K]\left. \ = 273.15\text{ }K \right\rbrack

  5. Question 5

    The d- and f-Block Elements. Asked once: 9 Apr 2024 (same type asked 4 times) See all 4 of this type

    142
    A transition metal 'M' among Sc, Ti, V, Cr, Mn and FeFe has the highest second ionisation enthalpy. The spin only magnetic moment value of M+M^{+}ion is ____ BM (Near integer) (Given atomic number Sc:21,Ti:22, V:23,CrSc:21,Ti:22,\text{ }V:23,Cr : 24, Mn:25,Fe:26)Mn:25,Fe:26)