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Day 296: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 29 Jun 2022 (same type asked 5 times) See all 5 of this type

    58
    Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g0.55\text{ }g of the compound neutralised 12.5 mL12.5\text{ }mL of 1MH2SO41MH_{2}SO_{4} solution. The percentage of nitrogen in the compound is (Nearest integer)

  2. Question 2

    Chemical Kinetics. Asked once: 9 Apr 2024 (same type asked 5 times) See all 5 of this type

    52
    Given below are two statements: Statement I: The rate law for the reaction A+B→CA + B \rightarrow C is rate (r)=k[A]2[ B](r) = k\lbrack A\rbrack^{2}\lbrack\text{ }B\rbrack. When the concentration of both AA and BB is doubled, the reaction rate is increased " xx " times. Statement II: The figure is showing "the variation in concentration against time plot" for a " yy " order reaction. The value of x+yx + y is. _______

  3. Question 3

    Electrochemistry. Asked once: 2021 Paper 19 (same type asked 5 times) See all 5 of this type

    55
    For the galvanic cell, Zn(s)+Cu2+(0.02 M)→Zn2+(0.04 M)+Cu(s)Zn(s) + Cu^{2 +}(0.02\text{ }M) \rightarrow Zn^{2 +}(0.04\text{ }M) + Cu(s), Ecell=____×10−2 VE_{\text{cell}}=\_\_\_\_\times10^{- 2}\text{ }V. (Nearest integer) [Use: ECu/Cu2+0=−0.34 VE_{Cu/Cu^{2 +}}^{0}= - 0.34\text{ }V, EZn/Zn2+0=+0.76 VE_{Zn/Zn^{2 +}}^{0}= + 0.76\text{ }V, 2.303RTF=0.059 V\frac{2.303RT}{F}= 0.059\text{ }V ]

  4. Question 4

    Haloalkanes and Haloarenes. Asked once: 30 Jan 2023 (same type asked 5 times) See all 5 of this type

    126
    Decreasing order towards SN1SN1 reaction for the following compounds is: (A) (B) (C) (D)

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  5. Question 5

    The d- and f-Block Elements. Asked once: 29 Jun 2022 (same type asked 5 times) See all 5 of this type

    57
    An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is ____ B.M. (Nearest integer)