PYQ Vault

Day 152: JEE Mains Chemistry

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

  1. Question 1

    The p-Block Elements. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    44
    Among the following halogens F2,Cl2,Br2F_{2},Cl_{2},Br_{2} and I2I_{2} Which can undergo disproportionation reaction?

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  2. Question 2

    Organic Reaction Mechanisms. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    128
    Match List-I with List-II.
    List-I (Test)List-II (Identification)
    (A)Baeyer's test(I)Phenol
    (B)Ceric ammonium nitrate test(II)Aldehyde
    (C)Phthalein dye test(III)Alcoholic -OH group
    (D)Schiff's test(IV)Unsaturation
    Choose the correct answer from the options given below :

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  3. Question 3

    Structure of Atom. Asked once: 29 Jul 2022 (same type asked 4 times) See all 4 of this type

    53
    The minimum uncertainty in the speed of an electron in an one dimensional region of length 2a02a_{0} (Where a0=a_{0}= Bohr radius  52.9pm)\left. \ 52.9pm \right) is ___ kms−1kms^{- 1}. (Given: Mass of electron =9.1×10−31 kg= 9.1 \times10^{- 31}\text{ }kg, Planck's constant  h=6.63×10−34Js)\left. \ h= 6.63 \times10^{- 34}Js \right)
  4. Question 4

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 27 Jan 2024 (same type asked 4 times) See all 4 of this type

    150
    Total number of compounds with Chiral carbon atoms from following is _____ .
  5. Question 5

    The p-Block Elements. Asked once: 5 Apr 2024 (same type asked 4 times) See all 4 of this type

    37
    Given below are two statements: Statement I: In group 13, the stability of +1 oxidation state increases down the group. Statement II: The atomic size of gallium is greater than that of aluminium. In the light of the above statements, choose the most appropriate answer from the options given below:

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