PYQ Vault
EbooksTutor

Day 55: JEE Mains Chemistry

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

  1. Question 1

    Hydrocarbons. This type asked 3 times: 2021 Paper 23, 27 Jan 2024, 24 Jan 2026 S2. This one: 24 Jan 2026 S2 See all 3 of this type

    45
    Given below are two statements : Statement I : There are several conformers for n- butane. Out of those conformers, (X) is the least stable and (Y) is the most stable conformer (both shown below). Statement II : As the dihedral angle increases, torsional strain decreases from (X) to (Y). In the light of the above statements, choose the correct answer from the options given below :

    Tap an option to check your answer.

  2. Question 2

    Solutions. This type asked 3 times: 14 Jun 2022, 29 Jul 2022, 24 Jan 2026 S2. This one: 24 Jan 2026 S2 See all 3 of this type

    43
    At 298 K , the mole percentage of N2( g)N_{2}(\text{ }g) in air is 80%80\%. Water is in equilibrium with air at a pressure of 10 atm . What is the mole fraction of N2( g)N_{2}(\text{ }g) in water at 298 K ? (KHK_{H} for N2N_{2} is 6.5×107 mmHg6.5 \times10^{7}\text{ }mmHg)

    Tap an option to check your answer.

  3. Question 3

    Amines. This type asked 3 times: 2021 Paper 24, 26 Jul 2022, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 3 of this type

    32
    The correct stability order of the following diazonium salts is (A) (B) (C) (D)

    Tap an option to check your answer.

  4. Question 4

    Chemical Kinetics. This type asked 3 times: 26 Jun 2022, 21 Jan 2026 S1, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 3 of this type

    41
    At 27∘C27^{\circ}C in presence of a catalyst, activation energy of a reaction is lowered by 10 kJ mol−110\text{ }kJ{\text{ }mol}^{- 1}. The logarithm ratio of k (catalysed) k (uncatalysed) \frac{k\text{~(catalysed)~}}{k\text{~(uncatalysed)~}} is .... (Consider that the frequency factor for both the reactions is same)

    Tap an option to check your answer.

  5. Question 5

    Coordination Compounds. This type asked 3 times: 30 Jan 2023, 7 Apr 2025, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 3 of this type

    33
    Consider a mixture ' X ' which is made by dissolving 0.4 mol of [Co(NH3)5SO4]Br\left\lbrack Co\left( NH_{3} \right)_{5}SO_{4} \right\rbrack Br and 0.4 mol of [Co(NH3)5Br]SO4\left\lbrack Co\left( NH_{3} \right)_{5}Br \right\rbrack SO_{4} in water to make 4 L of solution. When 2 L of mixture ' X ' is allowed to react with excess of AgNO3AgNO_{3}, it forms precipitate ' Y '. The rest 2 L of mixture ' X ' reacts with excess BaCl2BaCl_{2} to form precipitate ' ZZ '. Which of the following statements is CORRECT.

    Tap an option to check your answer.