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Day 86: JEE Mains Chemistry

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

  1. Question 1

    Electrochemistry. This type asked 2 times: 25 Jul 2022, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 2 of this type

    48
    An electrochemical cell. consist of the following two redox couples, Mx+(aq)/M(s)[Ered ⊖=+0.15 V]M^{x +}(aq)/M(s)\left\lbrack E_{\text{red~}}^{\ominus} = + 0.15\text{ }V \right\rbrack and Fe3+(aq)/Fe(s)[Ered ⊖=−0.036 V]{Fe}^{3 +}(aq)/Fe(s)\left\lbrack E_{\text{red~}}^{\ominus} = - 0.036\text{ }V \right\rbrackThe cell EMF ( Ecell E_{\text{cell~}} ) is recorded to be 0.2057 V . If the reaction quotient of the electrochemical reaction is found to be 10−210^{- 2}, then the value of x is ____\_\_\_\_ (Nearest integer) [Given : M is a p-block metal and  2.303RTF=0.059 V]\left. \ \frac{2.303RT}{F} = 0.059\text{ }V \right\rbrack

  2. Question 2

    Solutions. This type asked 2 times: 9 Apr 2024, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 2 of this type

    29
    At 27∘C,0.1M,1 L K K4[Fe(CN)6]27^{\circ}C,0.1M,1\text{ }L\text{ }K{\text{ }K}_{4}\left\lbrack Fe(CN)_{6} \right\rbrack aqueous solution and 0.1M,1 LFeCl30.1M,1\text{ }LFeCl_{3} aqueous solution are placed in a container separated by a semi permeable membrane AB . Assume complete dissociation of both the solutes. Which of the following statement is correct?

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  3. Question 3

    The d- and f-Block Elements. This type asked 2 times: 28 Jan 2025, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 2 of this type

    37
    Consider ∣x∣|x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with ∣x∣|x| number of unpaired electrons from the following are: (A) Sc3+{Sc}^{3 +} (B) Zn2+{Zn}^{2 +} (C) V2+V^{2 +} (D) Fe2+{Fe}^{2 +} (E) Co2+{Co}^{2 +} Choose the correct answer from the options given below:

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  4. Question 4

    Haloalkanes and Haloarenes. This type asked 2 times: 23 Jan 2025, 4 Apr 2026 S1. This one: 4 Apr 2026 S1 See all 2 of this type

    40
    Match the List-I with List-II
    List-I Name of reactionList-II Reagent or catalyst used
    (A)Finkelstein reaction(I)SbF3{SbF}_{3}
    (B)Swarts reaction(II)Na, dry ether
    (C)Sandmeyer's reaction(III)NaI
    (D)Fittig reaction(IV)Cu2Cl2{Cu}_{2}{Cl}_{2}
    Choose the correct answer from the options given below :

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  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 2 times: 2021 Paper 1, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 2 of this type

    28
    SF4SF_{4} is isostructural with : (A) BrF4⊖{BrF}_{4}^{\ominus} (B) CH4{CH}_{4} (C) IF4⊕{IF}_{4}^{\oplus} (D) XeF4{XeF}_{4} (E) XeO2 F2{XeO}_{2}{\text{ }F}_{2} Choose the correct answer from the options given below:

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