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P - Block Eleme...

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  • Question 1
    4 / -1

    When KBr is treated with concentrated H2SO4 redish brown gas evolved, gas is

  • Question 2
    4 / -1

    Which of following outer electronic configuration represents Ar?

  • Question 3
    4 / -1

    Which mineral was used in isolation of radium?

  • Question 4
    4 / -1

    Molecules of noble gas do not posses vibrational energy bec. Noble gas is

  • Question 5
    4 / -1

    Argon was discovered by

  • Question 6
    4 / -1

    The colour discharge tubes for advertisement mainly contain

  • Question 7
    4 / -1

    Least chemical activity is shown by

  • Question 8
    4 / -1

    Noble gases do not react with other elements because

  • Question 9
    4 / -1

    Monazite is source of

  • Question 10
    4 / -1

    He is added to oxygen supply used by deep sea divers because

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