Explanation

• Refrigerants are gases used in refrigerators to absorb heat and provide cooling.
• Freon (CFCs) and ammonia are commonly used in domestic and commercial refrigeration.
• They evaporate at low temperatures, absorbing heat from the fridge interior.
  

Last verified on 03-02-2026

Explanation

The first-ever general elections were held on 7th December 1970.

Yahya Khan issued a Legal Framework Order for the first general elections.

300 of the 313 seats in the National Assembly

of which 162 were in East Pakistan and 138 in West Pakistan.

A further thirteen seats were reserved for women (seven of which were in East Pakistan and six of which were in West Pakistan)

Explanation

LAN stands for local area network

It is a collection of devices connected together in one physical location

For example"

• school
• laboratory
• university campus 
• office building.

LAN covers can be small or large from home network and enterprise network

Additional Information

WAN stands for wide area network.

MAN stands for Metropolitan Area 

WANs and MANs connect many LANs together

WANs and MANs cover a large geographical area

Explanation

• Urea fertilizer contains 46% nitrogen (N).
• Urea is a white crystalline solid.
• It is widely used as a fertilizer and animal feed additive.

Last verified on 31-01-2026

Explanation

There are four fundamental states of matter: solid, liquid, gas and plasma

1. Solid: Fixed shape and volume; particles tightly packed.
2. Liquid: Fixed volume but takes container's shape; particles close but move.
3. Gas: No fixed shape or volume; particles far apart and move freely. 
4. Plasma: Ionized gas, found in stars, lightning; electrically charged.

Explanation

Singular noun: Mouse

Plural noun: Mice 

The plural for a computer mouse is either "mice" or "mouses" according to most dictionaries, with "mice" being more common.

Explanation

🔹 1 BTU = 1055.06 Joules (approx.)

🔹 1 BTU = 252 calories (approx.)

🔹 1 Joule = 0.0009478 BTU

🔹 1 kWh = 3412 BTU, linking electrical energy to heat energy.

🔹 Commonly used in heating/cooling systems

🔹 Named after the British engineers who developed early thermal measurements

Explanation

The common ostrich (Struthio camelus) is the biggest bird in the world.

It is weighing up to 344 pounds (157 kilograms) and standing 9 feet tall.

Female ostriches lay the largest eggs of any living bird.

Explanation

Electric power: Rate of energy transfer.

It is measured in watts (W), or one joule per second.

Energy/Work: Measured in joules (J).

Charge: Measured in coulombs (C).

Pressure: Measured in pascals (Pa).

Electric current: Measured in amperes (A).

Electric resistance: Measured in ohms (Ω).

Temperature: Measured in kelvin (K).

Torque: Measured in newton metres (N m).

Velocity: Measured in meters per second (m/s).

Acceleration: Measured in meters per second squared (m/s²).

Explanation

These seven continents are

1. Asia,
2. Africa,
3. North America,
4. South America,
5. Antarctica,
6. Europe,
7. Australia/Oceania,

First Largest Continents by area: are Asia,

Second Largest Continent by area: Africa,

Third Largest Continents by area: North America,

Fourth Largest Continents by area: South America,

Fifth Largest Continent by area: Antarctica,

Sixth Largest Continent by area: Europe,

Smallest Continents by Area: Australia.

 ****

AGM 23.02.2023