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Day 161: JEE Mains Chemistry

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

  1. Question 1

    Biomolecules. Asked once: 22 Jan 2025 (same type asked 3 times) See all 3 of this type

    32
    Which of the following acids is a vitamin?

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  2. Question 2

    Electrochemistry. Asked once: 5 Apr 2024 (same type asked 3 times) See all 3 of this type

    134
    For the electro chemical cell
    M∣M2+∣X∣X2−M\left| M^{2 +} \right|X \mid X^{2 -}
    If E(M2+/M)0=0.46 VE_{\left( M^{2 +}/M \right)}^{0}= 0.46\text{ }V and E(X/X2−)0=0.34 VE_{\left( X/X^{2 -} \right)}^{0}= 0.34\text{ }V Which of the following is correct?

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  3. Question 3

    Alcohols, Phenols and Ethers. Asked once: 22 Jan 2026 S2 (same type asked 3 times) See all 3 of this type

    44
    3,3-Dimethyl-2-butanol cannot be prepared by : (A) (B) (C) (D) (E) Choose the correct answer from the options given below :

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  4. Question 4

    Structure of Atom. Asked once: 6 Apr 2023 (same type asked 3 times) See all 3 of this type

    51
    The wavelength of an electron of kinetic energy 4.50×10−29 J4.50 \times10^{- 29}\text{ }J is...... ×10−5 m\times10^{- 5}\text{ }m. (Nearest integer) Given: mass of electron is 9×10−31 kg, h=6.6×9 \times10^{- 31}\text{ }kg,\text{ }h = 6.6 \times 10−34 J S10^{- 34}\text{ }J\text{ }S

  5. Question 5

    The d- and f-Block Elements. Asked once: 24 Jan 2026 S2 (same type asked 3 times) See all 3 of this type

    44
    " X " is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in " X ". The color of the potassium salt of X is

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