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Day 268: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 27 Jul 2022 (same type asked 3 times) See all 3 of this type

    56
    At 310 K310\text{ }K, the solubility of CaF2CaF_{2} in water is 2.34×10−3 g/100 mL2.34 \times 10^{-3}\text{ }g/100\text{ }mL. The solubility product of CaF2CaF_{2} is ____\_\_\_\_ ×10−10( mol/L)3\times 10^{-10}(\text{ }mol/L)^{3}. (Given molar mass: CaF2=78 g mol−1CaF_{2}= 78\text{ }g{\text{ }mol}^{-1})

  2. Question 2

    The d- and f-Block Elements. Asked once: 11 Apr 2023 (same type asked 3 times) See all 3 of this type

    139
    Match List I with List II. List I (Complex): (A) Mg(NH4)PO4Mg\left( NH_{4} \right)PO_{4}; (B) K3[Co(NO2)6]K_{3}\left\lbrack Co\left( NO_{2} \right)_{6} \right\rbrack; (C) MnO(OH)2MnO(OH)_{2}; (D) Fe4[Fe(CN)6]3Fe_{4}\left\lbrack Fe(CN)_{6} \right\rbrack_{3}. List II (Colour): (I) Brown; (II) White; (III) Yellow; (IV) blue. Choose the correct answer from the options given below:

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  3. Question 3

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

    122
    The IUPAC name of K3[Co(C2O4)3]K_{3}\left\lbrack Co\left( C_{2}O_{4} \right)_{3} \right\rbrack is :-

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  4. Question 4

    Structure of Atom. Asked once: 2021 Paper 20 (same type asked 3 times) See all 3 of this type

    53
    The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to h2xma02\frac{h^{2}}{xma_{0}^{2}}. The value of 10x10x is. (a0\left( a_{0} \right. is radius of Bohr's orbit) (Nearest integer) [Given: π=3.14\pi= 3.14 ]

  5. Question 5

    The d- and f-Block Elements. Asked once: 26 Jun 2022 (same type asked 3 times) See all 3 of this type

    56
    The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3, V2O4V_{2}O_{3},{\text{ }V}_{2}O_{4} and V2O5V_{2}O_{5} is ____ B.M. (Nearest Integer)