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    CBSE

    Subject

    Chemistry
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    NEET Chemistry : Redox Reactions

    Multiple Choice Questions

    21.

    Strongest Bronsted base among the following anions is

    • ClO4-

    • ClO3-

    • ClO2-

    • ClO-

    Answer
    • 22.

    Oxidation number Fe in K3 [FeCN)6] is

    • +1

    • +2

    • +3

    • +4

    Answer
    • 23.

    Which of the following is most powerful oxidising agent?

    • I2

    • Cl2

    • Br2

    • F2

    Answer
    • 24.

    Substances that are oxidised and reduced in the following reaction are respectively

    N2H4 (l) + 2H2O2 (l) →N2 (g) + 4H2O (l)

    • N2H4, H2O

    • N2H4, H2O2

    • N2, H2O2

    • H2O, N2

    Answer
    • 25.

    H2C2O4 + KMnO4 in acidic medium reacts to have change in oxidation number of Mn from

    • 7 to 5

    • 2 to 7

    • 5 to 7

    • 7 to 2

    Answer
    • 26.

    The colourless species is

    • VCl3

    • VOSO4

    • Na3VO4

    • [V(H2O)6]SO4.H2O

    Answer
    • 27.

    Oxidation number of Cr in K2Cr2O7 is

    • 2

    • 4

    • 6

    • 7

    Answer
    • 28.

    In [NiCl4]2-, the number of unpaired electrons, are

    • 4

    • 2

    • 3

    • 5

    Answer
    • 29.

    When MnO2 is fused with KOH, a colouredcompound is formed. The product and its colour is:

    • K2MnO4 , purple colour

    • Mn2O3 , brown

    • Mn2O4 , black

    • KaMnO4 , purple

    Answer
    • 30.

    For which of the following elements it is difficult to disproportionate in +3 oxidation state ?

    • N

    • As

    • Sb

    • Bi

    Answer
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