JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Noble Gases Family

  • question_answer
    Which is the lightest gas

    A) Hydrogen

    B) Oxygen

    C) Helium

    D) Nitrogen

    Correct Answer: A

    Solution :

    Gas  -           \[{{H}_{2}}\]  \[{{O}_{2}}\]  \[He\]  \[{{N}_{2}}\] Mol. mass -    2      32    4       28


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