A) incombustible
B) lighter than hydrogen
C) radioactive
D) more abundant than hydrogen
Correct Answer: A
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.You need to login to perform this action.
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