Explanation

• Common salt is chemically known as sodium chloride (NaCl).
• It is an ionic compound composed of sodium and chloride ions
• Representing a 1:1 ratio of sodium and chloride ions
• Formula: NaCl
• Melting point: 801 °C
• Density: 2.16 g/cm³
• Boiling point: 1,465 °C

Question updated on 11-02-2026

Explanation

• Bahadur Shah Zafar is the last Mughal emperor of India (reigned 1837–57).
• He was a poet, musician, and calligrapher, more an aesthete than a political leader.
• He was born October 24, 1775, in Delhi, India.
• He died November 7, 1862, in Rangoon [now Yangon], Myanmar.

Additional information:

• The first Mughal emperor was Babur, who founded the empire in 1526.

Last verified on 01-06-2026

Explanation

• The SI unit of power is the watt (W). 
• A watt is equal to one joule of work done per second. 
• Symbol: W
• Definition: 1 watt = 1 joule per second
• Named after: James Watt

Last verified on 05-10-2026

Explanation

Ghazwa Badr is mentioned in Surah Aal-e-Imran (Verses 123–125).
Ghazwa Uhud is also discussed later (Verses 121–180).

Additional information 
The Battle of Badr took place in 2 A.H (624 AD) near Madinah, the first major victory of Islam.
The Battle of Uhud (3 A.H) is discussed for moral and strategic lessons.

سورۃ آلِ عمران میں غزوہ بدر کا ذکر آیات 123 تا 125 میں اور غزوہ اُحد کا تفصیلی ذکر آیات 121 تا 180 میں آیا ہے۔

غزوہ بدر مسلمانوں کی پہلی بڑی فتح تھی۔

چونکہ دونوں غزوات اس صورت میں ہیں تو درست جواب کیا ہوگا

the correct answer is Ghazwa Badr,
because that’s where Allah directly mentions the name and victory of Badr.

Last updated by NS on 06 May 2026

Explanation

Explanation

• Watt (W) is the SI unit of power, while kilowatt (kW) is also a unit of power.
• 1 kilowatt = 1,000 watts.
• Power indicates the rate at which energy is used or transferred.

Additional information:

• Kilowatt-hour (kWh) is a unit of electrical energy.

Last verified on 05-10-2026

Explanation

• China — North‑northeast (around 559–595 km)
• Afghanistan — Northwest (~2,400 km+)
• India — East (~2,900 km+)
• Iran — West (~900 km)
• Arabian Sea — South (~1,046 km)

Last verified on 19-03-2026

Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026

Explanation

• Pakistan's second Constitution was enforced on 8 June 1962.
• It was introduced during the rule of Field Marshal Muhammad Ayub Khan.
• It introduced a presidential system instead of a parliamentary system.

Additional information:

• 23 March 1956 – First Constitution enforced.
• 14 August 1973 – Third (current) Constitution enforced.

Last verified on 07-07-2026

Explanation

• COMPUTER stands for Commonly Operated Machine Particularly Used for Technical Education and Research
• First electronic general-purpose computer: ENIAC
• Developed: 1945–1946
• Output devices: Monitor, Printer, Speaker, Projector
• Input devices: Keyboard, Mouse, Scanner, Microphone
• Father of the computer: Charles Babbage