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A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is:

Option 1 -

Na

Option 2 -

K

Option 3 -

Mg

Option 4 -

Ca

0 1 View | Posted 3 months ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    3 months ago
    Correct Option - 2


    Detailed Solution:

    An alkali metal oxide of formula MO2 is super oxide which is formed by K and Rb. KO2 has pale yellow colour and paramagnetic nature, while alkaline earth metal oxides formula MO2 are peroxide and diamagnetic nature.

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