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Day 364: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 31 Jan 2023 (same type asked 8 times) See all 8 of this type

    150
    Amongst the following, the number of species having the linear shape is XeF2,I3+,C3O2,I3−,CO2,SO2,BeCl2XeF_{2},I_{3}^{+},C_{3}O_{2},I_{3}^{-},CO_{2},SO_{2},BeCl_{2} and BCl2⊖BCl_{2}^{\ominus}

  2. Question 2

    Alcohols, Phenols and Ethers. Asked once: 29 Jan 2023 (same type asked 8 times) See all 8 of this type

    36
    The increasing order of pKapK_{a} for the following phenols is (A) 2,4-Dinitrophenol (B) 4-Nitrophenol (C) 2,4,5-Trimethylphenol (D) Phenol (E) 3-Chlorophenol Choose the correct answer from the option given below:

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  3. Question 3

    Structure of Atom. Asked once: 26 Jun 2022 (same type asked 7 times) See all 7 of this type

    33
    If the radius of the 3rd 3^{\text{rd~}} Bohr's orbit of hydrogen atom is r3r_{3} and the radius of 4th 4^{\text{th~}} Bohr's orbit is r4r_{4}. Then:

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  4. Question 4

    Chemical Kinetics. Asked once: 26 Jul 2022 (same type asked 7 times) See all 7 of this type

    124
    At 30∘C30^{\circ}C, the half- life for the decomposition of AB2AB_{2} is 200 s200\text{ }s and is independent of the initial concentration of AB2AB_{2}. The time required for 80%80\% of the AB2AB_{2} to decompose is (Given: log⁡2=0.30\log2 = 0.30; log⁡3=0.48)\log3 = 0.48)

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  5. Question 5

    Solutions. Asked once: 27 Jul 2022 (same type asked 7 times) See all 7 of this type

    144
    When a certain amount of solid A is dissolved in 100 g100\text{ }g of water at 25∘C25^{\circ}C to make a dilute solution, the vapour pressure of the solution is reduced to one-half of that of pure water. The vapour pressure of pure water is 23.76mmHg23.76mmHg. The number of moles of solute AA added is (Nearest Integer)