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it is one of the constitutents of water
it is lighter than air
its atomic number is 2
it is a noble gas
Helium gas is used in gas balloons instead of hydrogen gas as it is
Hemophilia is -
Herpetology is the study of:
Hodophobia is the fear of which of the following?
Holography is a technique of
Honey that has high concentration of sugar does not decay as
How do marine animals survive in water without air contact?
How does calcium carbide ripen mangoes
How does common salt help in separating soap from the solution after saponification?
How does the frequency of oscillations change due to damping