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Day 251: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 2021 Paper 23 (same type asked 4 times) See all 4 of this type

    52
     1.22 g\ 1.22\text{ }g of an organic acid is separately dissolved in 100 g100\text{ }g of benzene (Kb=2.6 K kg mol−1)\left( K_{b}= 2.6\text{ }K\text{ }kg{\text{ }mol}^{- 1} \right) and 100 g100\text{ }g of acetone (Kb=1.7 K kg mol−1)\left( K_{b}= 1.7\text{ }K\text{ }kg{\text{ }mol}^{- 1} \right). The acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point of the solution in acetone increases by 0.17∘C0.17^{\circ}C. The increase in boiling point of solution in benzene in  ∘C\ ^{\circ}C is x×10−2x \times10^{- 2}. The value of xx is (Nearest integer) [Atomic mass: =12.0,H=1.0,O=16.0= 12.0,H = 1.0,O = 16.0 ]

  2. Question 2

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 23 Jan 2026 S1 (same type asked 3 times) See all 3 of this type

    31
    ' xx ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' yy ' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrolysis. From the following, which product is not obtained when one mole of ' xx ' and one mole of ' y ' react with each other in the presence of alkali followed by heating?

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  3. Question 3

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

    51
    The equilibrium constant for the reaction A(s)⇌M(s)+12O2( g)A(s) \rightleftharpoons M(s) +\frac{1}{2}O_{2}(\text{ }g) is Kp=4K_{p}= 4. At equilibrium, the partial pressure of O2O_{2} is ____\_\_\_\_ atm. (Round off to the nearest integer)

  4. Question 4

    Haloalkanes and Haloarenes. Asked once: 29 Jan 2023 (same type asked 3 times) See all 3 of this type

    44
    Identify the correct order for the given property for following compounds. (A) Boiling Point: (B) Density: (C) Boiling Point: (D) Density: (E) Boiling Point: Choose the correct answer from the option given below:

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  5. Question 5

    Structure of Atom. Asked once: 8 Apr 2024 (same type asked 3 times) See all 3 of this type

    149
    Wavenumber for a radiation having 5800A˚5800\text{\AA} wavelength is x×10 cm−1x\times 10{\text{ }cm}^{-1}. The value of xx is ____