Explanation

• The empirical formula of water is H₂O

• Freezing point: 0°C (32°F)
• Boiling point: 100°C
• Molar mass: 18.015 g/mol
• Density: 997 kg/m³
• Melting point: 0°C

Last updated by NA on 25-April-2026

Explanation

Explanation

• A barometer measures atmospheric (air) pressure.
• It helps in weather forecasting, detecting storms, and studying climate changes.
• Two common types of barometers: mercury barometer and aneroid barometer.

Last verified on 13-03-2026

Explanation

• Energy due to motion is called kinetic energy.
• Any moving object possesses this energy.
• It depends on mass and velocity of the body.
• Faster motion means more kinetic energy.

Last verified on 11-04-2026

Explanation

• Designer: Amir Uddin Kidwai Adoption Date: 11 August 1947 (officially adopted) Additional information: Green field – represents Muslims of Pakistan White stripe – represents minorities and religious minorities’ rights Crescent and star – symbol of progress and light Proportion of flag: 2:3 (height:width)

Last verified on 16-01-2026

Explanation

• Qutb Uddin Aibak was a slave and general of Muhammad Ghauri.
• Later becoming the first ruler of the Delhi Sultanate.
• After Ghauri's assassination in 1206, Aibak declared himself Sultan of Delhi and established the Mamluk (Slave) Dynasty.

Last verified on 03-04-2026

Explanation

• Muhammad Bin Qasim was the close relative/nephew of Hajjaj bin Yusuf.
• He was the son-in-law of Hajjaj bin Yousuf.
• Because of him, he was appointed the governor of Persia.
• Hajjaj ibn Yusuf was the governor of the Umayyad Caliphate from 692–694.

Additional information:

• Muhammad ibn Qasim led the Muslim conquest of Sindh.
• From Raja Dahir in the battle of Aror.
• He was the first Muslim to have successfully captured Hindu territories.
• He initiated the early Islamic India in 712 AD.

Last verified on 03-04-2026

Explanation

Vasco da Gama was a famous explorer and navigator from Portugal.

Additional information:

• Born: 1460, Sines, Portugal
• Died: 1524, Cochin, India
• Famous Achievement: First European to reach India by sea in 1498
• Significance: Opened direct maritime trade between Europe and Asia

Last verified on 15-01-2026

Explanation

• Spiritual means روح، مذہب، یا اندرونی زندگی
• Religion means روح، مذہب، یا اندرونی زندگی

Last verified on 17-03-2026

Explanation

• Pakistan Standard Time (PST) is 5 hours ahead of Greenwich Mean Time (GMT).
• Suggested by Professor Muhammad Anwar in 1951.
• GMT is the standard time of Greenwich, UK, used as a reference worldwide.
• Example: When it is 12:00 noon GMT, it is 5:00 PM in Pakistan.

Last verified on 17-03-2026