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Day 140: JEE Mains Chemistry

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

  1. Question 1

    Electrochemistry. Asked once: 29 Jul 2022 (same type asked 4 times) See all 4 of this type

    144
    For a cell, Cu(s)∣Cu2+(0.001 M)∥Ag+(0.01 M)∣Ag(s)Cu(s) \mid Cu^{2 +}(0.001\text{ }M) \parallel Ag^{+}(0.01\text{ }M) \mid Ag(s), the cell potential is found to be 0.43 V0.43\text{ }V at 298 K298\text{ }K. The magnitude of standard electrode potential for Cu2+/CuCu^{2 +}/Cu is ____ ×10−2 V\times 10^{- 2}\text{ }V. [Given: EAg+/Ag∘=0.80 V and 2.303RTF=0.06 V]\left\lbrack \text{Given: }E_{Ag^{+}/Ag}^{\circ} = 0.80\text{ }V\text{ and }\frac{2.303RT}{F} = 0.06\text{ }V \right\rbrack

  2. Question 2

    The p-Block Elements. Asked once: 30 Jan 2024 (same type asked 4 times) See all 4 of this type

    31
    Given below are two statements: Statement-I: The gas liberated on warming a salt with dil H2SO4H_{2}SO_{4}, turns a piece of paper dipped in lead acetate into black, it is a confirmatory test for sulphide ion. Statement-II: In statement-I the colour of paper turns black because of formation of lead sulphite. In the light of the above statements, choose the most appropriate answer from the options given below:

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  3. Question 3

    Alcohols, Phenols and Ethers. Asked once: 6 Apr 2024 (same type asked 4 times) See all 4 of this type

    33
    Given below are two statements: Statement I: Picric acid is 2,4,6-trinitrotoluene. Statement II: Phenol-2,4-disulphonic acid is treated with conc. HNO3HNO_{3} to get picric acid. In the light of the above statement, choose the most appropriate answer from the options given below:

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  4. Question 4

    Amines. Asked once: 7 Apr 2025 (same type asked 4 times) See all 4 of this type

    27
    Which of the following amine (s) show (s) positive carbylamines test ? A. Aniline B. (CH3)2NH\left( {CH}_{3} \right)_{2}NH C. CH3NH2{CH}_{3}{NH}_{2} D. (CH3)3 N\left( {CH}_{3} \right)_{3}\text{ }N E. N-Methylaniline. Choose the correct answer from the options given below:

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  5. Question 5

    Coordination Compounds. Asked once: 6 Apr 2023 (same type asked 4 times) See all 4 of this type

    129
    Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R". Assertion A: In the complex Ni(CO)4Ni(CO)_{4} and Fe(CO)5Fe(CO)_{5}, the metals have zero oxidation state. Reason R: Low oxidation states are found when a complex has ligands capable of π\pi-donor character in addition to the σ\sigma-bonding. In the light of the above statements, choose the most appropriate answer from the option given below.

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