Explanation

• Hazrat Ali (R.A) ruled as Caliph for about 4 years and 9 months (656–661 CE).
• His caliphate began in 35 AH (656 CE) after the martyrdom of Hazrat Uthman (R.A).
• It ended in 40 AH (661 CE) with his martyrdom in Kufa.

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

• Amazon river in South America is the largest river in the world.
• Nile river in Africa is the longest river in the world.

Additional information:

Last verified on 10-06-2026

Explanation

• Ornithology is the branch of zoology that deals with the study of birds.
• It includes bird behavior, classification, and migration patterns.
• Scientists who study birds are called ornithologists.

Last verified on 10-06-2026

Explanation

• The hardest substance in the world is diamond.
• Its hardness is due to the strong covalent bonding between its carbon atoms.
• This making it the most resistant to scratching.

Additional information:

• Category: Native minerals
• Cleavage: 111 (perfect in four directions)
• Crystal class: Hexoctahedral (m3m); H-M symbol: (4/m 3 2/m)
• Crystal habit: Octahedral
• Crystal system: Cubic
• Dana classification: 1.3.6.1
• Density: 3.5–3.53 g/cm3 3500–3530 kg/m3

Last verified on 07-06-2026

Explanation

• Presentation layer is responsible for encryption and decryption in the OSI model.
• It ensures data is converted into a secure and usable format.
• It handles data translation, compression, and encryption.

Last verified on 08-06-2026

Explanation

• India took the Kashmir issue to the United Nations on January 1, 1948.
• This move was made under Article 35 of the UN Charter.
• It allows member states to bring situations that could endanger international peace to the Security Council's attention.

Last verified on 08-06-2026

Explanation

• Copper (تانبا) is a good conductor of electricity.
• It allows electric current to flow easily.

Additional information:

• Metals are generally good conductors.
• Non-metals usually do not conduct electricity.
• Good Conductors: Copper, Silver, Gold, Aluminum, Graphite
• Bad Conductors: Plastic, Rubber, Wood, Glass, Air

Last verified on 07-06-2026

Explanation

Surface area = 4πr², Volume = 4/3πr³.  

Surface area is just derivative of volume w.r.t r.

2πr is circumference of a circle, not volume at all.

Last verified on 07-06-2026

Explanation

• Thar Coalfield Location: Tharparkar, Sindh
• Region: Thar Desert
• Discovery Year: 1991
• Rank: Among 16th largest coal reserves globally
• Importance: Electricity and energy production

Last verified on 06-06-2026