Explanation

• Name: Trygve Halvdan Lie
• Tenure: 1 Feb 1946 – Nov 1952
• Nationality: Norway
• Organization: United Nations (UNO)
• Role: First administrative head of the UN after its formation

Additional information:

UNO Secretary-General List:

1. Trygve Lie (1st)
2. Dag Hammarskjöld (2nd)
3. U Thant (3rd)
4. Kurt Waldheim (4th)
5. Javier Pérez de Cuéllar (5th)
6. Boutros Boutros-Ghali (6th)
7. Kofi Annan (7th)
8. Ban Ki-moon (8th)
9. António Guterres (9th/Current)

Last updated 07 Nov 2026 by NA

Explanation

• Water has maximum density at 4°C.
• When Water is in its Solid form (Ice) below 0°C.

Last verified on 27-10-2026

Explanation

• The speed of sound is generally maximum in solids.
• Because their particles are closely packed and elastic forces transmit vibrations rapidly.

Additional information:

• Solids: Sound generally travels fastest, e.g., Steel: 5,000–6,000 m/s
• Liquids: Sound travels slower than in most solids, e.g., Water: 1,480 m/s
• Gases: Sound travels slowest under ordinary conditions, e.g., Air at 20°C: 343 m/s

Last verified on 15-10-2026

Explanation

• Other name: Peace Pipeline
• Countries: Iran and Pakistan
• Purpose: Transportation of natural gas
• Proposed length: 2,775 km
• Pakistan President at inauguration ceremony: Asif Ali Zardari
• Iranian President: Mahmoud Ahmadinejad
• Inauguration: 11 March 2013

Last verified on 04-09-2026

Explanation

• Genetics: Study of heredity and variation in organisms.
• An Austrian monk who experimented with pea plants in the 19th century is known as the "Father of Modern Genetics"

Additional information

• Ecology: Study of organisms and their environment.
• Anatomy: Study of the structure of organisms.
• Evolution: Study of how living organisms change over generations.

Last updated by NA on 06-11-2026

Explanation

• A seismograph is an instrument used to detect and record earthquakes.
• It consists of a mass attached to a fixed base
• During an earthquake, the base moves and the mass does not.

Last verified on 07-09-2026

Explanation

• Samina Baig became the first Pakistani woman to summit Mount Everest on 19 May 2013.
• Mount Everest is the highest mountain in the world.
• It is located in the Himalayas, on the Nepal–China border.
• Its officially recognized height is 8,848.86 metres (29,031.7 feet).

Additional information:

• Youngest Pakistani to summit Everest: Shehroze Kashif (in 2021).
• First Pakistani man to summit Everest: Nazir Sabir (2000).
• The first confirmed climbers to reach its summit were Sir Edmund Hillary and Tenzing Norgay on 29 May 1953.

Last verified on 10-10-2026

Explanation

• Ole Rømer was the first person to experimentally demonstrate that light has a finite speed in 1676.
• He used observations of Jupiter’s moon Io to estimate the speed of light.

Additional information:

• The modern accepted speed of light in vacuum is 299,792,458 m/s.

Last verified on 07-10-2026

Explanation

• The Government of India Act 1935 was a major constitutional reform introduced by the British Parliament.
• Its most important implemented feature was provincial autonomy.
• It abolished dyarchy in the provinces and gave provinces greater authority over their own administration.
• The proposed federation at the center was never fully implemented.

Last verified on 08-09-2026

Explanation

• The Mariana Trench is the deepest part of the Earth.
• It is located in the western Pacific Ocean.
• Its deepest point is called Challenger Deep.

Additional information:

• Depth: 10,994 meters
• Length: ~2,550 km
• Width: ~69 km

Last verified on 31-03-2026