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Day 203: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 25 Jan 2023 (same type asked 2 times) See all 2 of this type

    147
    The number of pairs of the solutions having the same value of the osmotic pressure from the following is (Assume 100%100\% ionization) A. 0.500MC2H5OH(aq)0.500MC_{2}H_{5}OH\left( aq \right) and 0.25MKBr(aq)0.25MKBr\left( aq \right) B. 0.100MK4[Fe(CN)6]0.100MK_{4}\left\lbrack Fe(CN)_{6} \right\rbrack (aq) and 0.100MFeSO4(NH4)2SO40.100MFeSO_{4}\left( NH_{4} \right)_{2}SO_{4} (aq) C. 0.05MK4[Fe(CN)6]0.05MK_{4}\left\lbrack Fe(CN)_{6} \right\rbrack (aq) and 0.25MNaCl(aq)0.25MNaCl\left( aq \right) D. 0.15MNaCl(aq)0.15MNaCl\left( aq \right) and 0.1MBaCl20.1MBaCl_{2} (aq) E. 0.02MKCl⋅MgCl2⋅6H2O(aq)0.02MKCl \cdot MgCl_{2}\cdot 6H_{2}O\left( aq \right) and 0.05MKCl(aq)0.05MKCl\left( aq \right)

  2. Question 2

    Biomolecules. Asked once: 28 Jul 2022 (same type asked 2 times) See all 2 of this type

    48
    For the below given cyclic hemiacetal (X), the correct pyranose structure is :

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  3. Question 3

    Coordination Compounds. Asked once: 25 Jun 2022 (same type asked 2 times) See all 2 of this type

    59
    If [Cu(H2O)4]2+\left\lbrack Cu\left( H_{2}O \right)_{4} \right\rbrack^{2 +} absorbs a light of wavelength 600 nmnm for d−dd - d transition, then the value of octahedral crystal field splitting energy for [Cu(H2O)6]2+\left\lbrack Cu\left( H_{2}O \right)_{6} \right\rbrack^{2 +} will be ____ ×10−21 J\times10^{- 21}\text{ }J. (Nearest Integer) (Given: h=6.63×10−34 J sh = 6.63 \times10^{- 34}\text{ }J\text{ }s and c=3.08×108 ms−1c = 3.08 \times10^{8}{\text{ }ms}^{- 1})

  4. Question 4

    The d- and f-Block Elements. Asked once: 2021 Paper 12 (same type asked 2 times) See all 2 of this type

    24
    Cu2+Cu^{2 +} salts reacts with KIKI and forms:

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 15 (same type asked 2 times) See all 2 of this type

    32
    In which of the following changes does the oxidation state change by 5?

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