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S-Block Element...

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  • Question 1
    1 / -0

    Cs+ ion imparts violet colour to the flame. This is due to the fact that the emitted radiations have

  • Question 2
    1 / -0

    The metallic luster of sodium is explained by

  • Question 3
    1 / -0

    Highly pure dilute solution of sodium in liquid ammonia

    a. shows blue colour
    b. exhibits electrical conductivity
    c. produces sodium amide
    d. produces hydrogen gas

    Choose the correct points.

  • Question 4
    1 / -0

    All the compounds listed below will react with water. In which of the following cases is the same gaseous product obtained?

    a. Na
    b. Na2O2
    c. KO2
    d. NaH

  • Question 5
    1 / -0

    Which of the following alkali metals forms only normal oxide, M2O, on heating in air?

  • Question 6
    1 / -0

    Which of the following pairs of elements will respectively give superoxides and peroxides when heated with excess of air?

    a. K, Br
    b. Na, Rb
    c. K, Rb
    d. Na, Ba

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