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Day 202: JEE Mains Chemistry

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

  1. Question 1

    Alcohols, Phenols and Ethers. Asked once: 2021 Paper 20 (same type asked 2 times) See all 2 of this type

    46
    Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below:

    Tap an option to check your answer.

  2. Question 2

    Structure of Atom. Asked once: 24 Jan 2023 (same type asked 2 times) See all 2 of this type

    141
    Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is A. T4>T3>T2>T1T_{4}>T_{3}>T_{2}>T_{1} B. The black body consists of particles performing simple harmonic motion. C. The peak of the spectrum shifts to shorter wavelength as temperature increases. D. T1v1=T2v2=T3v3≠\frac{T_{1}}{v_{1}}=\frac{T_{2}}{v_{2}}=\frac{T_{3}}{v_{3}}\neq constant E. The given spectrum could be explained using quantisation of energy.

  3. Question 3

    The p-Block Elements. Asked once: 8 Apr 2023 (same type asked 2 times) See all 2 of this type

    56
    XeF4XeF_{4} reacts with SbF5SbF_{5} to form
    [XeFm]n+[SbFy]z−\left\lbrack XeF_{m} \right\rbrack^{n +}\left\lbrack SbF_{y} \right\rbrack^{z -}
    m+n+y+z=m + n + y + z =_____

  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 21 (same type asked 2 times) See all 2 of this type

    53
    Two flasks I and II shown below are connected by a valve of negligible volume. When the valve is opened, the final pressure of the system in bar is x×10−2x \times10^{- 2}. The value of xx is (Integer answer) [Assume-Ideal gas; 1bar=105 Pa1bar =10^{5}\text{ }Pa; Molar mass of  N2=28.0 g mol−1;R=8.31 J mol−1 K−1]\left. \ N_{2}= 28.0\text{ }g{\text{ }mol}^{- 1};R = 8.31\text{ }J{\text{ }mol}^{- 1}{\text{ }K}^{- 1} \right\rbrack

  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 2021 Paper 6 (same type asked 2 times) See all 2 of this type

    46
    Match List-I with List-II List-I LIST-II Test/Reagents/Observation(s) species detected (A) Lassaigne's Test (i) Carbon (B) Cu(II)Cu(II) oxide (ii) Sulphur (C) Silver nitrate (iii) N, S, P, and halogen (D) The sodium fusion extract (iv) Halogen Specifically gives black precipitate with acetic acid and lead acetate The correct match is:

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