Explanation

• Khewra Salt Mine is located in Khewra near Pind Dadan Khan, Jhelum District, Punjab.
• It is the largest and oldest salt mine in Pakistan.
• It is the second-largest in the world.

Additional information:

• It is also called the Mayo Salt Mine.
• The salt deposits were discovered during the campaign of Alexander the Great in 326 BC.
• The mine was officially opened in 1872 during the British period.

Last verified on 14-03-2026

Explanation

• The Indus Waters Treaty was signed on September 19, 1960, in Karachi.
• It was signed between Pakistan (President Ayub Khan) and India (Prime Minister Jawaharlal Nehru).
• It was brokered by the World Bank.

It became effective on April 1, 1960.

• Western Rivers (given to Pakistan): Indus, Jhelum, Chenab
• Eastern Rivers (given to India): Ravi, Beas, Sutlej

Last verified on 30-03-2026

Explanation

• Rutherford’s gold foil experiment (1911) showed that an atom has a small, dense, positively charged center called the nucleus.
• The mass of the atom is concentrated in the nucleus, while most of the atom is empty space.

Additional information:

• Nucleus contains: Protons (+) and neutrons (neutral)
• Electrons move around the nucleus in mostly empty space
• The experiment involved alpha particles being deflected by the nucleus.

Last verified on 10-02-2026

Explanation

• A slide is the basic unit of a Microsoft PowerPoint presentation.
• Each slide can contain text, images, charts, tables, audio, video, and animations.
• A presentation consists of one or more slides arranged in sequence.

Additional information:

• The default file extension of a PowerPoint presentation is .pptx (since Office 2007).
• PowerPoint is widely used for education, business, meetings, and seminars.

Last verified on 22-07-2026

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

• Country: Australia
• Founded: 16 November 1920
• Headquarters: Mascot, New South Wales, Australia
• First International Passenger Flight: May 1935
• Full Name: Qantas Airways Limited (Originally: Queensland and Northern Territory Aerial Services)

Additional information:

• Emirates → United Arab Emirates (UAE)
• Saudia → Saudi Arabia
• Malaysia Airlines → Malaysia
• Pakistan International Airlines (PIA) → Pakistan

Last verified on 21-07-2026

Explanation

• Connection: Links Mediterranean Sea to Red Sea
• Location: Egypt
• Opened: 1869
• Length: 193 km
• Purpose: Provides the shortest maritime route from Europe to Asia

Last verified on 08-02-2026

Explanation

Explanation

• UNO Headquarters: Manhattan, New York City.

Additional information:

• UNO Stands for: United Nations Organization
• Founded: 24 October 1945 (after World War II 1939–1945)
• Member States: 193 countries
• Official Languages (6): Arabic, Chinese, English, French, Russian, Spanish
• Motto: “It’s your world!” (commonly used awareness slogan)
• Pakistan Joined UNO: 30 September 1947

Last verified on 10-06-2026

Explanation

Russia Capital is Moscow.

Russia Currency is Ruble.

Russia official language is Russian.

Russia located is in Continent Europe/ Asia.

Russia Primary Religion is Christianity.

Russia Parliament called Duma & Federal Council.

Last verified on 14-03-2026