Helium | MCQs

Explanation

Hydrogen is the most abundant element in the universe.

it is about 75 percent of its normal matter and was created in the Big Bang.

Additional information:

Oxygen is the most abundant element in the earth`s crust.

Calcium is the most abundant mineral in the human body.

Explanation

Hydrogen and helium are the two lightest gases.

Helium is the second most abundant element in the universe, after hydrogen.

Helium has monatomic molecules.

It is the lightest of all gases except hydrogen.

Hydrogen is the lightest gas known.

It provides the maximum lift for balloons due to its very low density.

Explanation

The first evidence of helium was observed on August 18, 1868

 as a bright yellow line with a wavelength of 587.49-nanometers in the spectrum of the chromosphere of the Sun.

The line was detected by French astronomer Jules Janssen during a total solar eclipse in Guntur, India.

Explanation

The US is the world's largest helium producer, providing 40 percent of world supply.

In addition, the US federal government sold 30 million cubic meters from storage.

Other major helium producers were Algeria and Qatar.

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Explanation

• The lightest gas used for filling party and advertisement balloons is hydrogen.
• However, due to its flammability, helium is more commonly used despite being slightly heavier, because it is safe and non-reactive.