Mix hydrochloric acid with aluminium and you'll get hydrogen. It is highly flammable and using a bottle you can fill a balloon to blow up when you want.

test Introduction to Chemistry

Introduction to ChemistryIntroduction to Chemistry

Self healing hydrogels and its industrial applications

Hydrogels are water-swollen, cross-linked polymeric structures produced by reactions of monomers or by hydrogen bonding. This hydrogels used in various applications .