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Day 377: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 23 (same type asked 9 times) See all 9 of this type

    59
    According to molecular orbital theory, the number of unpaired electron(s) in O22−O_{2}^{2 -} is:

  2. Question 2

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 13 (same type asked 9 times) See all 9 of this type

    41
    If concentration of glucose (C6H12O6)\left( C_{6}H_{12}O_{6} \right) in blood is 0.72 g/L0.72\text{ }g/L. Its molarity is:

  3. Question 3

    The p-Block Elements. Asked once: 29 Jan 2023 (same type asked 8 times) See all 8 of this type

    139
    Given below are two statements: Statement I: The decrease in first ionization enthalpy from BB to AlAl is much larger than that from AlAl to Ga. Statement II: The d orbitals in Ga are completely filled. In the light of the above statements, choose the most appropriate answer from the options given below

    Tap an option to check your answer.

  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 21 (same type asked 8 times) See all 8 of this type

    59
    The number of species having non-pyramidal shape among the following is (A) SO3SO_{3} (B) NO3−NO_{3}^{-} (C) PCl3PCl_{3} (D) CO32−CO_{3}^{2 -}

  5. Question 5

    Coordination Compounds. Asked once: 8 Apr 2023 (same type asked 19 times) See all 19 of this type

    131
    Match List I with List II :-
    ------------------ List I Coordination Complex --------------------------------- List II Number of unpaired electrons ---------------
    (A)
    [Cr(CN)6]3−\left\lbrack Cr(CN)_{6} \right\rbrack^{3 -}
    		(I)0
    (B)
    [Fe(H2O)6]2+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(II)3
    (C)
    [Co(NH3)6]3+\left\lbrack Co\left( NH_{3} \right)_{6} \right\rbrack^{3 +}
    		(III)2
    (D)
    [Ni(NH3)6]2+\left\lbrack Ni\left( NH_{3} \right)_{6} \right\rbrack^{2 +}
    		(IV)4
    Choose the correct answer from the options given below:

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