Statement I: A hydrogen-filled balloon stops rising after it has attained a certain height in the sky.
Statement II: The atmospheric pressure decreases with height and becomes zero when the maximum height is attained.

Statement I : A hydrogen-filled balloon stops rising after it has attained a certain height in the sky. Statement II : The atmospheric pressure decreases with height and becomes zero when maximum height is attained.

Statement-1: A gas filled balloon stops rising after it has attained a certain height in the sky. Statement-2: At the highest point the density of air is such that the buoyant force on the balloon just equals its weight.

Statement-1: A gas filled balloon stops rising after it has attained a certain height in the sky. Statement-2: At the highest point the density of air is such that the buoyant force on the balloon just equals its weight.

Statement-1: A gas filled balloon stops rising after it has attained a certain height in the sky. Statement-2: At the highest point the density of air is such that the buoyant force on the balloon just equals its weight.

Assertion : A balloon stops rising after attaining a certain maxium height . Reason : Upthrust due to air decreases with height till it just balances the weight of the balloon.