Explanation

Water gas is a mixture of Carbon Monoxide (CO) and Hydrogen (H2).

Water Gas is formed when steam is passed over red-hot coke.

Formula: H₂O

Boiling point: 100°C

Explanation

The dielectric constant of water at around 18°C is approximately 80.

This high value makes water an excellent polar solvent for ionic and polar compounds.

Explanation

3% of Earth's water is fresh water.

2.5% of that fresh water is unavailable because it is:

• Locked in glaciers and polar ice caps
• Present in the atmosphere and soil
• Too deep underground to extract affordably

Only 0.5% of Earth's water is available as usable fresh water for human use.

Explanation

The mesosphere is the coldest layer of the atmosphere, with temperatures dropping as low as -90°C.

It lies above the stratosphere and below the thermosphere.

Explanation

They do not perform Baeyer's Test statement is not true because alkynes do perform Baeyer's Test, which detects unsaturation (like double or triple bonds).

In Baeyer's Test, potassium permanganate gets decolorized if alkynes are present, indicating a reaction.

Explanation

Salat-e-Khasoof is performed on the occasion of the Lunar eclipse (چاند گرہن)

It occurs in two or Four zakaah prayer 

It is a Nafli, not an obligatory prayer.

Additional information:

Salat ul  Kusuf (نمازكسوف)is a two or Four-zakaah prayer performed during a solar eclipseسورج گرہن,

Explanation

A rectifier is an electrical device that converts Alternating Current (AC) into Direct Current (DC).

It works by allowing current to flow only in one direction using diodes.

Explanation

Explanation

Priestly discover oxygen in 1776.

Oxygen makes up about 46-50% of the Earth's crust by weight, mainly in the form of oxides and silicates.

It is also a major component of water (H₂O).

It is abundant in the atmosphere as O₂.

Explanation

Acid rain is mainly caused by emissions of Sulfur dioxide and Nitrogen oxide in the atmosphere.

Acid rain mainly Causes health problem like Asthma.