A balloon filled up with gas would only go up in air if it is filled up with

A balloon filled up with gas would only go up in air if it is filled up with

  1. A gas whose density is lower then air
  2. A gas whose density is higher than air
  3. Cold air
  4. Water vapour
Anurag Mishra Professor Asked on 25th November 2014 in General Knowledge.
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  • 1 Answer(s)

    Answer: (1) A gas whose density is lower than air 

    Anurag Mishra Professor Answered on 11th May 2016.
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