Explanation

5 × 2 = 10

10 × 2 = 20

20 × 2 = 40

40 × 2 = 80

Last verified on 11-2026

Explanation

• Ornithology is the branch of zoology that deals with the study of birds.
• It includes bird behavior, classification, and migration patterns.
• Scientists who study birds are called ornithologists.

Last verified on 10-06-2026

Explanation

• Signed: 14 May 1955
• Headquarters: Moscow, USSR (now Russia)
• Members: USSR + 7 countries
• Type: Military defense alliance
• Purpose: Counter NATO (North Atlantic Treaty Organization)

Last verified on 10-06-2026

Explanation

• The usual gases used for lifting airships are hydrogen and helium.
• Hydrogen is the lightest known gas and thus has great lifting capacity,
• Helium is not as buoyant but is far safer than hydrogen because it does not burn.

Last verified on 01-04-2026

Explanation

• The smallest province of Pakistan by area is KPK.
• Balochistan is the largest province of Pakistan by area.
• Area wise second largest province of Pakistan is Punjab.

Last verified on 30-03-2026

Explanation

• Battery is a device that converts chemical energy into electrical energy.
• Batteries work by using a galvanic cell.
• It is an electrochemical device made up of two electrodes and an electrolyte solution.

Last verified on 16-03-2026

Explanation

• Sea water contains a high amount of dissolved salts.
• Because of salinity, its freezing point is lower than fresh water.
• Fresh water freezes at 0°C, but saltwater freezes at a lower temperature.

Last verified on 01-06-2026

Explanation

• Muawiya I
• Reign: 661–680 AD

• Marwan II
• Reign: 744–750 AD

• The Umayyad Caliphate was the first major Islamic dynasty after the Rightly Guided Caliphs.
• It was founded after the end of the Rashidun Caliphate in 661 AD.
• The dynasty ruled a vast empire from Spain to Central Asia.
• It ended in 750 AD after defeat by the Abbasids.

Last verified on 31-05-2026

Explanation

• Vitamin D is essential for healthy bones.
• Its deficiency leads to Rickets in children and Osteomalacia in adults.
• Sunlight is the best natural source of Vitamin D.

Additional information:

Deficiency effects:

• Bone pain
• Weak bones
• Skeletal deformities

Other Vitamin Deficiencies:

• Vitamin A: Night blindness
• Vitamin C: Scurvy
• Vitamin B7 (Biotin): Hair fall

Last verified on 17-01-2026

Explanation

• The Nobel Prize was first awarded in 1901
• Inaugurated on December 10, 1901
• Awarded in Stockholm, Sweden.
• Inventor of dynamite, Alfred Nobel

Additional information

Since 1901, the Nobel Prize has been awarded in the fields of

1. Physics
2. Chemistry
3.  Physiology/Medicine
4.  Literature
5.  Peace
6.  Economics.

Last updated question by NA on 07 May 2026