Helium (He) is also lighter than air and makes balloons float, but it is an inert gas and non- flammable, making it a much safer choice than Hydrogen for balloons.
It would be less safe to fill a gas balloon with the following gas :
Asked in APPSC Panchayat secretary Prelims 2016 · Topic: Hydrogen and Its Compounds (Uses of Dihydrogen)
More Chemistry questions
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