Explanation

Explanation

• Nitrous oxide, commonly known as laughing gas.
• It is a colorless, non-flammable gas used in medicine.
• Nitrous oxide (N₂O) causes temporary laughing and relaxation.

Additional information:

• Nitrous oxide was discovered by Joseph Priestley in 1772.

Last verified on 18-01-2026

Explanation

• The Sui Gas Field, located near Sui in Balochistan Province, Pakistan.
• It was discovered by Pakistan Petroleum Limited in 1952.
• Production of Sui gas began in 1955.
• It remains the largest natural gas field in Pakistan.

Explanation

• Carbon dioxide (CO₂) plays a crucial role in maintaining Earth’s atmospheric temperature.
• It traps heat through the greenhouse effect, keeping the planet warm enough for life.

Additional information:

• CO₂ levels in 2025 reached ~421 ppm (parts per million) globally.
• Plants absorb CO₂ for photosynthesis, partially regulating its atmospheric concentration.

Last verified on 17-01-2026

Explanation

Explanation

Argon is chemically inert and does not easily form compounds, a key property of noble gases.

It belongs to Group 18 of the periodic table, which contains all noble gases.

Explanation

Explanation

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.

Explanation

The temperature increases with an increase in Pressure in a closed system, or in specific atmospheric layers like the stratosphere or thermosphere.

Explanation

• Air is a mixture of different gases.
• Primarily consisting of nitrogen (78%), oxygen (21%), and trace amounts of other gases.