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Yami Thakur • 9.05K Points
Tutor III Chemistry 

Q. A balloon filled with helium rises in air because

  • (A) Air exerts an upward force on the balloon
  • (B) The balloon is weightless
  • (C) Helium is less dense than air
  • (D) Helium pushes down on the air below the balloon
Correct Answer - Option(C)

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