Explanation

• Main Cause: Freon / CFCs
• Effect: Breaks down O₃ molecules → more UV-B radiation
• Other Contributors: Halons, carbon tetrachloride
• Result: Skin cancer, cataracts, climate impact

• The Montreal Protocol (1987) aimed to reduce CFC emissions
• Ozone layer protects Earth from harmful ultraviolet rays

Explanation

• WTO (World Trade Organization) was established on 1 January 1995.
• It succeeded GATT.
• Pakistan joined WTO on 1 January 1995.

Additional information:

• Members: 164
• Headquarters: Geneva, Switzerland
• Official Languages: English, French, Spanish

Objectives:

• Protect Intellectual Property Rights
• Promote Free Trade
• Remove Trade Quotas

Last verified on 16-01-2026

Explanation

• NATO is a military alliance.
• NATO stands for North Atlantic Treaty Organization.
• Founded: 4 April 1949 (Washington, USA).
• Headquarters: Brussels, Belgium
• Official Languages: English & French.
• Founding Members: 12

Total Members: 32

• European: 30
• North American: 2

Latest Member: Sweden (joined 7 March 2024)

• Muslim Member Country: Türkiye
• Pakistan: Not a NATO member

List of NATO member countries:

1. Albania
2. Belgium
3. Bulgaria
4. Canada
5. Croatia
6. Czechia
7. Denmark
8. Estonia
9. France
10. Germany
11. Greece
12. Hungary
13. Iceland
14. Italy
15. Latvia
16. Lithuania
17. Luxembourg
18. Montenegro
19. Netherlands
20. North Macedonia
21. Norway
22. Poland
23. Portugal
24. Romania
25. Slovakia
26. Slovenia
27. Spain
28. Turkiye
29. United Kingdom
30. United States
31. Finland
32. Sweden

Last verified on 17-03-2026

Explanation

• Ctrl + V is the shortcut key used to paste copied or cut text.

Additional information:

• Ctrl + C — Copy
• Ctrl + X — Cut
• Ctrl + Z — Undo
• Ctrl + A — Select All

Last verified on 23-08-2026

Explanation

• The SUM function in MS Excel is used to add numbers from selected cells or ranges (e.g., =SUM(A1:A5)).
• It is one of the most commonly used functions for quick total calculations in spreadsheets.

Last verified on 26-05-2026

Explanation

• GUI stands for Graphical User Interface.
• It uses icons, windows, and menus for interaction.
• It is easier to use than command-based interfaces.
• MS-DOS and Apple DOS are command-line interfaces.

Last verified on 11-04-2026

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

• Spreadsheet software is used for calculations and data organization.
• MS Excel is a widely used spreadsheet program.
• It works with rows, columns, and formulas.

Last verified on 11-04-2026

Explanation

• HTML (Hypertext Markup Language) is the standard markup language used for creating web pages.
• It is the backbone of webpage development.
• It providing the structure and content that appears on the web.

Last verified on 08-08-2026

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