Explanation

• Gymnosperms are plants whose seeds are not enclosed inside an ovary or fruit.
• The word gymnosperm means “naked seed.”
• Examples include pine, cycas, and fir.
• Their seeds are often borne on the scales of cones.

Last verified on 16-10-2026

Explanation

• Nitrogen (N₂) → 78%

Additional information:

• Oxygen (O₂) → 21%
• Argon (Ar) → 0.93%
• Carbon dioxide (CO₂) → 0.04% (approximately)
• Other gases → Trace amounts

Last verified on 28-06-2026

Explanation

• A Barometer is an instrument used to measure air (atmospheric) pressure.
• It helps in weather forecasting by measuring changes in atmospheric pressure.
• The mercury barometer is the oldest type of barometer.
• It was invented by Evangelista Torricelli in 1643.
• Barometers are widely used in meteorology and aviation.

Last verified on 09-07-2026

Explanation

• Date: 27 October
• Observed as: Kashmir Black Day
• First oberved Year: 1947
• Purpose: To mark the arrival of Indian troops in Srinagar.

Explanation

• A velocity–time graph shows how velocity changes with time.
• The slope gives acceleration.
• The area under the graph represents motion covered.
• It connects velocity with displacement.

Last verified on 22-05-2026

Explanation

• Hazrat Khalid bin Waleed (R.A) was given the title “Saifullah” (Sword of Allah).
• Given by: Holy Prophet Muhammad (PBUH)
• Born: 592 AD (Makkah)
• Died: 642 AD (Homs, Syria)
• Served under: Prophet Muhammad (PBUH), Abu Bakr (R.A), Umar (R.A)

Last verified on 10-06-2026

Explanation

• Surah Al-Baqarah is the longest chapter (surah) in the Holy Quran
• Chapter Number: 2nd chapter in the Quran.
• Meaning: "The Cow" or "The Heifer".
• Verse Count: 286 verses (ayat).
• Length: Spans about 2.5 parts (juz') of the Quran
• .Place of Revelation: Madinah. 
• It derives its name from the story of the cow (vv. 67-73).
• Verse 282, the longest verse, is known as 'āyatu d-dayn.
• It consists of 25,500 letters.
• The chapter has 40 Rukus.

Additional information:

• Surah Al-Kausar is the shortest surah of the Holy Quran.
• Surah Aal-e-Imran is the second-longest surah of the Holy Quran.

Last updated NA on 10-09-2026

Explanation

• Sir James Chadwick discovered the neutron in 1932.
• He was a British physicist.
• His discovery completed the basic picture of the atomic nucleus.
• He received the Nobel Prize in Physics in 1935 for this discovery.

Additional information:

• J. J. Thomson – Electron (1897)
• Ernest Rutherford – Atomic nucleus (1911) and Proton (1917)

Last verified on 03-07-2026

Explanation

• Smallest bone: Stapes.
• Location: Middle ear.
• Three ear bones: Malleus, Incus, Stapes.

Additional information:

• Longest bone: Femur (thigh bone).
• Adult human skeleton: Usually 206 bones.
• Newborn: About 300 bones at birth; many later fuse together.
• Human skull: 22 bones (8 cranial + 14 facial)

Last verified on 03-09-2026

Explanation

• Author: Shuja Nawaz, a Pakistani-American author and South Asia analyst.
• Publication year: 2019 (Penguin Random House India edition).
• Main topic: Pakistan’s complex relationship with the United States and its regional neighbours, particularly Afghanistan and India.

Last verified on 14-10-2026