Helium is used in balloons in place of hydrogen because it is
incombustible
more abundant than hydrogen
radioactive
lighter than hydrogen
Additional Questions
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When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from |
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Which one of the following orders correctly represents the increasing acid strengths of the given acids? |
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Which one of the following is an amphoteric oxide? |
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Which is most easily liquefiable rare gas? |
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The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is |
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Which of the following reactions of xenon compounds is not feasible? |
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The percentage of p–character in the orbitals forming P – P bonds in P4 is |
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Which is the strongest acid in the following? |
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Which of the following is not oxidized by O3? |
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Which of the following does not give oxygen on heating? |
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