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Day 393: JEE Mains Chemistry

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

  1. Question 1

    Haloalkanes and Haloarenes. Asked once: 2 Apr 2026 S2

    40
    Correct statements regarding alkyl halides ( R−XR - X ) among the following are : (A) Alcohol being less polar solvent as compared to water, alcoholic KOH favours elimination reaction with R−XR - X. (B) Order of reactivity towards SN1S_{N}1 mechanism is C6H5−CH2−Cl>C6H5−CHCl−C6H5C_{6}H_{5} - {CH}_{2} - Cl > C_{6}H_{5} - CHCl - C_{6}H_{5}. (C) Non substituted aryl halides exhibit properties similar to alkyl halides. (D) Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne. (E) R−ClR - Cl can be prepared by reacting R−OHR - OH with SOCl2{SOCl}_{2} but Ar−ClAr - Cl cannot be prepared by reacting Ar−OHAr - OH with SOCl2{SOCl}_{2}. Choose the correct answer from the options given below :

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  2. Question 2

    Hydrocarbons. Asked once: 5 Apr 2026 S2

    47
    RMgI when treated with ice cold water liberated a gas which occupied 1.4dm3/g1.4{dm}^{3}/g at STP. The gas produced is further reacted with iodine in presence of HIO3{HIO}_{3} to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y)(Y). Molar mass of compound (Y)(Y) is ____\_\_\_\_ gmol−1g{mol}^{- 1}. (Nearest integer)

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 4 Apr 2026 S1

    48
    2.0 g of a bromo hydrocarbon ( X ) was subjected to Carius analysis, gave 3.36 g of AgBr . The percentage of carbon in the compound ( X ) is 26.7%26.7\%. Total number of carbon atoms in the empirical formula for compound ( X ) is ____\_\_\_\_ . (Given molar mass in gmol−1H:1,C:12g{mol}^{- 1}H:1,C:12, Br : 80, Ag : 108)

  4. Question 4

    Organic Reaction Mechanisms. Asked once: 4 Apr 2026 S2

    31
    Match the LIST-I with LIST-II
    List-I ReactionList-II Mechanism
    (A)Williamson Synthesis(I)Electrophilic addition
    (B)Friedel-Crafts reaction(II)Free radical substitution
    (C)Bromination of vinyl benzene(III)Nucleophilic substitution
    (D)Chlorination of toluene in light(IV)Electrophilic substitution
    Choose the correct answer from the options given below:

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  5. Question 5

    Solutions. Asked once: 6 Apr 2026 S2

    30
    Given below are two statements :
    Chamber 1Semipermeable membraneChamber 2
    18 g glucose in 100 mL aqueous solution30 g glucose in 250 mL aqueous solution
    Statement I: H2OH_{2}O molecules move from the chamber 1 to chamber 2. Statement II: The osmotic pressure of a solution prepared by dissolving 50 mg of potassium sulphate (molar mass =174 g/mol= 174\text{ }g/mol) in 2 L of water (at 27∘C27^{\circ}C) is 0.0107 bar. (Given : R=0.083dm3R = 0.083{dm}^{3} bar K−1 mol−1K^{-1}{\text{ }mol}^{-1} and assume complete dissociation of electrolyte) In the light of the above statements, choose the correct answer from the options given below :

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