Question

We have observed a balloon seller filling a large number of balloons from a single cylinder. Which gas does he have in the cylinder?????

Answer 1

he have helium gas in the cylinder

Answer 2

We have observed a balloon seller's balloon always floats up. So he needs to tie it to his cycle. This happens because of the presence of a lighter gas inside the balloons. Hydrogen is a very light gas which can float. So it is present in the cylinder of the balloon seller. So even the amount of gas is less, it will float.