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Day 255: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 28 Jun 2022 (same type asked 3 times) See all 3 of this type

    44
    The correct structure of product ' AA ' formed in the following reaction.

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  2. Question 2

    Coordination Compounds. Asked once: 2021 Paper 19 (same type asked 3 times) See all 3 of this type

    44
    Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value. Complexes: A=[CoF6]3−A = \left\lbrack CoF_{6} \right\rbrack^{3 -}, B=[Co(H2O)6]2+B = \left\lbrack Co\left( H_{2}O \right)_{6} \right\rbrack^{2 +}, C=[Co(NH3)6]3+C = \left\lbrack Co\left( NH_{3} \right)_{6} \right\rbrack^{3 +} and D=[Co(en)3]3+D = \left\lbrack Co(en)_{3} \right\rbrack^{3 +}. Choose the correct option:

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  3. Question 3

    Coordination Compounds. Asked once: 2021 Paper 8 (same type asked 3 times) See all 3 of this type

    37
    Match List-I with List-II: LIST-I LIST-II (A) [Co(NH3)6][Cr(CN)6]\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack\left\lbrack Cr(CN)_{6} \right\rbrack (i) Linkage isomerism (B) [Co(NH3)3(NO2)3]\left\lbrack Co\left( {NH}_{3} \right)_{3}\left( {NO}_{2} \right)_{3} \right\rbrack (ii) Solvate isomerism (C) [Cr(H2O)6]Cl3\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack{Cl}_{3} (iii) Co-ordination isomerism (D) cis−[CrCl2(ox)2]3−cis - \left\lbrack {CrCl}_{2}(ox)_{2} \right\rbrack^{3 -} (iv) Optical isomerism Choose the correct answer from the options given below :

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  4. Question 4

    Solutions. Asked once: 26 Jun 2022 (same type asked 3 times) See all 3 of this type

    145
    The osmotic pressure exerted by a solution prepared by dissolving 2.0 g2.0\text{ }g of protein of molar mass 60 kg mol−160\text{ }kg{\text{ }mol}^{- 1} in 200 mL200\text{ }mL of water at 27∘C27^{\circ}C is ____ PaPa. [integer value] (use R=0.083 Lbarmol−1 K−1R = 0.083\text{ }Lbarmol^{- 1}{\text{ }K}^{- 1} )

  5. Question 5

    Structure of Atom. Asked once: 2021 Paper 19 (same type asked 3 times) See all 3 of this type

    54
    A metal surface is exposed to 500 nm500\text{ }nm radiation. The threshold frequency of the metal for photoelectric current is 4.3×1014 Hz4.3 \times10^{14}\text{ }Hz. The velocity of ejected electron is ____ ×105 ms−1\times10^{5}{\text{ }ms}^{- 1} (Nearest integer) [Use: h=6.63×10−34Js,me=9.0×10−31 kgh = 6.63 \times10^{- 34}Js,m_{e}= 9.0 \times10^{- 31}\text{ }kg ]