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Day 276: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 11 Apr 2023 (same type asked 2 times) See all 2 of this type

    57
    A solution of sugar is obtained by mixing 200 g200\text{ }g of its 25%25\% solution and 500 g500\text{ }g of its 40%40\% solution (both by mass). The mass percentage of the resulting sugar solution is______ (Nearest integer)

  2. Question 2

    Coordination Compounds. Asked once: 29 Jan 2025 (same type asked 19 times) See all 19 of this type

    101
    The calculated spin-only magnetic moments of K3[Fe(OH)6]K_{3}\left\lbrack Fe(OH)_{6} \right\rbrack and K4[Fe(OH)6]K_{4}\left\lbrack Fe(OH)_{6} \right\rbrack respectively are :

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  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 3 Apr 2025 (same type asked 15 times) See all 15 of this type

    43
    Match the LIST-I with LIST-II
    LIST-I (Molecules/ion)LIST-II (Hybridisation of central atom)
    A.
    PF5{PF}_{5}
    		I
    dsp2{dsp}^{2}
    B.
    SF6{SF}_{6}
    		II.
    sp3 d{sp}^{3}\text{ }d
    C.
    Ni(CO)4Ni(CO)_{4}
    		III.
    sp3 d2{sp}^{3}{\text{ }d}^{2}
    D.
    [PtCl4]2−\left\lbrack {PtCl}_{4} \right\rbrack^{2 -}
    		IV.
    sp3{sp}^{3}
    Choose the correct answer from the options given below:

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  4. Question 4

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 3 Apr 2025 (same type asked 15 times) See all 15 of this type

    119
    What is the correct IUPAC name of.

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 2 Apr 2025 (same type asked 14 times) See all 14 of this type

    33
    CaCO3( s)+2HCl(aq)→CaCl2(aq)+CO2( g)+H2O(l)CaCO_{3}(\text{ }s) + 2HCl(aq) \rightarrow CaCl_{2}(aq) +CO_{2}(\text{ }g)+H_{2}O(l) Consider the above reaction, what mass of CaCl2CaCl_{2} will be formed if 250 mL of 0.76 M HCl reacts with 1000 g of CaCO3CaCO_{3} ? (Given : Molar mass of Ca,C,O,HCa,C,O,H and Cl are 40, 12,16,112,16,1 and 35.5 g mol−135.5\text{ }g{\text{ }mol}^{- 1}, respectively)

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