Explanation

Nitrogen makes up about 78% of Earth's atmosphere,

It is the most abundant gas.

It is essential for plant growth as.

It is a key component of proteins and DNA.

Nitrogen is the chemical element with the symbol N and atomic number 7.

It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

Explanation

Nitrogen (N₂) makes up 78% of Earth's atmosphere and is not a pollutant.

NO₂ and SO₂ are major air pollutants from vehicles and industries.

Explanation

LPG (Liquefied Petroleum Gas) mainly consists of hydrocarbons like propane and butane.

These are gases composed of hydrogen and carbon atoms.

It is used as fuel for cooking and heating.

Explanation

The least polluted gas chlorine.

The most polluted gas is carbon monoxide.

Explanation

Ammonia: (NH3)

It is a colorless gas with a distinct odor composed of nitrogen and hydrogen atoms.

Explanation

 The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

Explanation

Refrigerators are cooled through the evaporation of a volatile liquid that is,

they use a liquid that evaporates very easily,

and this evaporation creates a cooling effect.

Explanation

Hydrogen and helium, the lightest two gases,

Hydrogen is a chemical element

It is colorless, odorless, tasteless, non-toxic, and highly combustible. 

Symbol: H

Atomic mass: 1.00784 u

Atomic number: 1

Atomic mass : zero

Boiling point: -252.9 °C

Discoverer: Henry Cavendish

Explanation

Carbon Dioxide gas is used to make soda water.

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VU FIA SUB INSPECTOR PAPER 30-1-2021

Explanation

The gas filled in the pockets of chips is: Nitrogen