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Day 413: JEE Mains Chemistry

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

  1. Question 1

    Haloalkanes and Haloarenes. Asked once: 21 Jan 2026 S1

    29
    A hydrocarbon ' P ' (C4H8)\left( C_{4}H_{8} \right) on reaction with HCl gives an optically active compound ' Q ' (C4H9Cl)\left( C_{4}H_{9}Cl \right) which on reaction with one mole of ammonia gives compound ' R ' (C4H11 N)\left( C_{4}H_{11}\text{ }N \right). ' R ' on diazotization followed by hydrolysis gives ' S '. Identify P,Q,RP,Q,R and S .

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  2. Question 2

    Hydrocarbons. Asked once: 2 Apr 2026 S2

    39
    The compound (X) on (i) on heating in the presence of anhydrous AlCl3{AlCl}_{3} and HCl gas gives 2, 4-dimethyl pentane (ii) aromatization gives toluene and (iii) cyclisation gives methyl cyclohexane The correct name of compound (X)(X) is :

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  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 24 Jan 2026 S2

    35
    Find out the statements which are not true. (A) Resonating structure with more number of covalent bonds and lesser charge separation are more stable. (B) In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile. (C) Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds. (D) The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation. (E) Stability of carbanion increases with the increase in s-character of the carbon carrying the negative charge. Choose the correct answer from the options given below.

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  4. Question 4

    Organic Reaction Mechanisms. Asked once: 29 Jan 2025

    50
    0.1 mole of compound ' SS ' will weigh _____\_\_\_\_\_ g. (Given molar mass in gmol−1C:12,H:1,O:16gmol^{- 1}C:12,H:1,O:16 )

  5. Question 5

    Solutions. Asked once: 4 Apr 2025

    107
    Given below are two statements: Statement (I) : Molal depression constant KfK_{f} is given by M1RTfΔSfus\frac{M_{1}RT_{f}}{\Delta S_{fus}}, where symbols have their usual meaning. Statement (II) : KfK_{f} for benzene is less than the KfK_{f} for water. In the light of the above statements, choose the most appropriate answer from the options given below :

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