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  4. Helium is used in balloons in place of hydrogen because it is

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Q. Helium is used in balloons in place of hydrogen because it is

KCETKCET 2008The p-Block Elements - Part2

Solution:

Helium (He) is a non-flammable (incombustible) gas and its lifting power is $93 \%$ as compared to flammable hydrogen gas, due to these reasons it is used in filling balloons and other lighter air-crafts.