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

• 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

• Reko Diq is one of the largest copper and gold reserves in the world.
• It is located in Chagai District, Balochistan, Pakistan.
• The deposits were discovered in 1969.
• It is a planned mining project aimed at extracting copper and gold.
• Project Developer: Tethyan Copper Company

Last verified on 01-04-2026

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

• After the Hijrah (622 AD), the Prophet's (ﷺ) camel knelt near the house of Hazrat Abu Ayub Ansari (RA).
• He hosted the Holy Prophet (ﷺ) for about 7 months.
• He hosted the Prophet SAW until Masjid-e-Nabawi and the Prophet's rooms were completed.
• His original name was Khalid bin Zayd of the Banu Najjar tribe.

Last verified on 21-07-2026

Explanation

• Became separate province: 1 April 1936, capital Karachi
• Annexed to Bombay Presidency: 1843
• Part of Pakistan: 14 August 1947 – 14 October 1955, capital Hyderabad
• Separation demanded by: Muhammad Ali Jinnah in 1929 under Government of India Act 1935
• First Muslim League Government in Sindh: 1943

Last verified on 15-01-2026

Explanation

• Scanner: Converts physical images/text into digital form.
• Uses light: Detects and captures the image.
• Output: Digital image or document.

Last updated by NA ON 16-09-2026

Explanation

• Headquarters: Tehran, Iran.
• Established: 1985.
• Founding countries: Türkiye, Iran, and Pakistan.
• Official language: English.
• Purpose: To promote economic, technical, and cultural cooperation among member states.

ECO Member States (10):

1. Türkiye
2. Iran
3. Pakistan
4. Afghanistan
5. Azerbaijan
6. Kazakhstan
7. Kyrgyz Republic
8. Uzbekistan
9. Tajikistan
10. Turkmenistan

Last verified on 14-10-2026

Explanation

ترقی پسند تحریک کے پہلے اجلاس (لکھنؤ، اپریل 1936ء) کی صدارت منشی پریم چند نے کی۔

اسی اجلاس میں انہوں نے مشہور جملہ کہا: ہمیں حسن کا معیار بدلنا ہوگا۔

یہ خطبہ ترقی پسند تحریک کا بنیادی منشور سمجھا جاتا ہے جس میں ادب کو سماجی حقیقتوں سے جوڑنے پر زور دیا گیا۔

Last verified on 02-06-2026

Explanation

• Author: Chaudhry Khaliquzzaman
• English edition published: 1961
• Urdu edition published: 1967
• Nature of book: Autobiography / Memoirs
• Topic: Pakistan Movement and political struggle

Last verified on 18-01-2026