Explanation

The usual gases used for lifting airships are hydrogen and helium.

Hydrogen is the lightest known gas and thus has great lifting capacity,

Helium is not as buoyant but is far safer than hydrogen because it does not burn.

Explanation

Bronze is an Alloy consisting primarily of copper, commonly with about 12-12.5% tin .

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RY 23-12-2022

Explanation

Cooking gas, also known as liquified petroleum gas (LPG), is a mixture of propane and butane.

It is a flammable mixture of hydrocarbon gases.

Explanation

Aluminum is the most abundant metal in the Earth's crust.

It comprising about 8% of its weight.

It is primarily found in the form of bauxite ore.

Explanation

Graphite is a crystalline form of the element carbon.

It consists of stacked layers of graphene.

Graphite occurs naturally and is the most stable form of carbon under standard conditions.

Explanation

The British physicist Sir James Chadwick discovered neutrons in the year 1932.

He was awarded the Nobel Prize in Physics in the year 1935 for this discovery.

Explanation

Sodium chloride, commonly known as table salt, is an ionic compound with the chemical formula NaCl,

representing a 1:1 ratio of sodium and chloride ions

Formula: NaCl

Explanation

CNG stands for Compressed Natural Gas

Methane is the main component of CNG 

the modern use of CNG as a fuel source began in the 1930s,

American physicist Dr. J.P. Farley discovered that natural gas could be compressed to a high-pressure 

natural gas became a transport fuel during the First World War

Explanation

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.