Helium is preferred to hydrogen in air balloons because it (a) is che

1.	Helium is preferred to hydrogen in air balloons because it (a) is cheaper (b) is less dense (c) has greater lifting power (d) does not form an explosive mixture with air
Answer» (d) does not form an explosive mixture with air Explanation: Hydrogen combines with oxygen with explosive force in the presence of a spark. Helium is an inert gas that will not burn or explode so is much safer to use in balloons instead of hydrogen.

Helium is preferred to hydrogen in air balloons because it (a) is cheaper (b) is less dense (c) has greater lifting power (d) does not form an explosive mixture with air

Answer»

(d) does not form an explosive mixture with air

Explanation:

Hydrogen combines with oxygen with explosive force in the presence of a spark. Helium is an inert gas that will not burn or explode so is much safer to use in balloons instead of hydrogen.

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Helium is preferred to hydrogen in air balloons because it (a) is cheaper (b) is less dense (c) has greater lifting power (d) does not form an explosive mixture with air

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