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Day 42: JEE Mains Chemistry

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

  1. Question 1

    Electrochemistry. This type asked 4 times: 25 Jun 2022, 13 Apr 2023, 29 Jan 2024, 22 Jan 2025. This one: 22 Jan 2025 See all 4 of this type

    26
    A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2 A . The amount of the aluminium deposited at the cathode is ___\_\_\_ .[Given : molar mass of aluminium and chlorine are 27 g mol−127\text{ }g{\text{ }mol}^{- 1} and 35.5 g mol−135.5\text{ }g{\text{ }mol}^{- 1} respectively, Faraday constant  =96500Cmol−1]\left. \ = 96500Cmol^{- 1} \right\rbrack.

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  2. Question 2

    Some Basic Concepts of Chemistry. This type asked 4 times: 25 Jun 2022, 26 Jul 2022, 24 Jan 2023, 22 Jan 2025. This one: 22 Jan 2025 See all 4 of this type

    125
    20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is _______\_\_\_\_\_\_\_ ×10−2M\times10^{- 2}M. (Nearest integer).

  3. Question 3

    The p-Block Elements. This type asked 4 times: 2021 Paper 11, 31 Jan 2024, 8 Apr 2024, 22 Jan 2025. This one: 22 Jan 2025 See all 4 of this type

    106
    The species which does not undergo disproportionation reaction is :

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  4. Question 4

    Organic Reaction Mechanisms. This type asked 4 times: 2021 Paper 26, 1 Feb 2023, 8 Apr 2024, 9 Apr 2024. This one: 9 Apr 2024 See all 4 of this type

    125
    Match List I with List II
    LIST-I (Test)LIST-II (Observation)
    A.Br2Br_{2} water testI.Yellow orange or orange red precipitate formed
    B.Ceric ammonium nitrate testII.Reddish orange colour disappears
    C.Ferric chloride testIII.Red colour appears
    D.2,4-DNP testIV.Blue, Green, Violet or Red colour appear
    Choose the correct answer from the options given below:

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  5. Question 5

    Structure of Atom. This type asked 4 times: 2021 Paper 26, 27 Jun 2022, 29 Jul 2022, 9 Apr 2024. This one: 9 Apr 2024 See all 4 of this type

    147
    Based on Heisenberg's uncertainty principle, the uncertainty in the velocity of the electron to be found within an atomic nucleus of diameter 10−15 m10^{- 15}\text{ }m is _____ ×109 ms−1\times10^{9}{\text{ }ms}^{- 1} (nearest integer) [Given: mass of electron =9.1×10−31 kg= 9.1 \times10^{- 31}\text{ }kg, Plank's constant (h)=6.626×10−34Js(h) = 6.626 \times10^{- 34}Js ] (Value of π=3.14\pi = 3.14 )