Explanation

• Symbol: Hg
• Atomic number: 80
• Melting point: -38.83 °C
• Atomic mass: 200.59 u

Last verified on 13-03-2026

Explanation

• Lead pencil is made up of graphite.
• Graphite is a form (allotrope) of carbon.
• It is soft and leaves marks on paper easily.
• It is used in pencils because of its slippery layered structure.
• Despite the name “lead pencil,” it contains no real lead.
• Graphite was named by Abraham Gottlob Werner in 1789.

Last verified on 21-06-2026

Explanation

• Mars is known as the Red Planet due to its reddish appearance.
• Its surface contains iron oxide (rust) which gives it a red color.
• It is the 4th planet from the Sun in the solar system.
• Mars has two small moons: Phobos and Deimos.
• Mars is often called the “planet of future exploration”.

Last verified on 12-06-2026

Explanation

• Habsha is the historic name for Ethiopia.
• It is located in the Horn of Africa.
• The Migration to Abyssinia, also known as the First Hegira.

Last verified on 19-03-2026

Explanation

• Aggressive means جارحانہ
• Quarrelsome means جھگڑا
• Violent means متشدد

Last verified on 10-06-2026

Explanation

• Faisalabad is called Manchester of Pakistan.
• Because it's the biggest textile city in Pakistan.
• It is formerly known as Lyallpur.
• It is the third-largest city in Pakistan.
• It is the second largest city in the Province of Punjab.
• It is famous for its textile mills.

Last verified on 16-03-2026

Explanation

An isosceles triangle is a triangle with two sides of equal length.

If all three sides are equal, it is called an equilateral triangle.

A scalene triangle has all sides of different lengths, and a right triangle has one right angle (90 degrees).

Last verified on 15-03-2026

Explanation

• Sublimation is the direct transition of a solid into a gas without passing through the liquid phase.

Additional information:

Some common sublimating substances:

• Dry ice (CO₂) – solid → gas
• Iodine crystals – solid → violet gas
• Camphor – solid → vapor
• Naphthalene (mothballs) – solid → gas
• Ammonium chloride – solid → gas

Last verified on 13-03-2026

Explanation

• Launch Date: August 2012
• Introduced by: National Database and Registration Authority (NADRA)
• Type: Smart National Identity Card (SNIC)
• Feature: Embedded chip with biometric security

Last verified on 08-06-2026

Explanation

tan 45° = 1

cot 45° = 1

tan² 45° + cot² 45°

= 1² + 1²

= 1 + 1

= 2

Last verified on 19-03-2026