Question

.Which gas is filled in balloons? ​

Answer 1

helium

A gas balloon is a balloon that rises and floats in the air because it is filled with a gas lighter than air (such as helium or hydrogen). When not in flight, it is tethered to prevent it from flying away and is sealed at the bottom to prevent the escape of gas.

Answer 2

Answer:

Gas balloons that are available for party and play are usually filled with Helium gas which is less expensive and safe.

hope it helps you

please mark me as brainliest