Explanation

• The chemical formula for tetrafluoroethylene is C₂F₄.

Additional information:

• Chemical name: Polytetrafluoroethylene (PTFE)
• Monomer: Tetrafluoroethylene
• Notable property: Highly non-stick surface, often used in cooking utensils

Last verified on 14-11-2026

Explanation

• Prophet Musa (A.S) is mentioned about 136 times in the Holy Qur’an.
• Prophet Musa (A.S) was given the Torah (Tawrat) as a divine book.
• He is one of the Ulul-Azm prophets (the prophets of strong determination).

Additional information:

• Ibrahim (A.S) – about 69 times
• Nuh (A.S) – about 43 times
• Lut (A.S) – about 27 times
• Isa (A.S) – about 25 times

Last verified on 14-03-2026

Explanation

• Aldehydes and ketones contain a polar carbonyl group (C=O) which is susceptible to nucleophilic attack.
• They commonly undergo nucleophilic addition reactions, a key feature of their reactivity.

Last verified on 13-11-2026

Explanation

• Surah Al-Naml has Bismillah twice in the Holy Quran.
• It contains Bismillah at the beginning and again in Verse 30 (message of Prophet Sulaiman AS).
• Surah: 27th
• Verses: 93rd
• Type: Makki Surah
• Name Meaning: “The Ants”

Additional information:

• In contrast, Surah Al-Toba starts without Bismillah.
• Bismillahir Rahmanir Raheem is repeated 114 times in the Quran.

Last verified on 12-06-2026

Explanation

• Diffusion is the process where particles move from an area of high concentration to low concentration.
• Ink spreads evenly in water due to molecular motion, resulting in uniform distribution.

Last verified on 08-11-2026

Explanation

The formula to calculate max electrons in an orbit is 2n², where n = orbit number.

1. 1st orbit (n = 1): 2 × 1² = 2 electrons
2. 2nd orbit (n = 2): 2 × 2² = 8 electrons
3. For the 3rd orbit (n = 3): 2 × 3² = 18 electrons

Last verified on 07-11-2026

Explanation

• A species is defined as a group of organisms that can mate and produce fertile offspring.
• Organisms in different genera generally cannot produce fertile offspring.

Last verified on 06-11-2026

Explanation

• The Basic Principles Committee (BPC) was established on 12 March 1949 to help prepare Pakistan’s future constitution.
• It worked on constitutional principles in light of the Objectives Resolution, passed on 12 March 1949.
• The committee examined constitutional issues and made recommendations concerning the structure of government and distribution of powers.
• The Objectives Resolution was later incorporated into Pakistan’s Constitution through Article 2A in 1985.

Last verified on 22-10-2026

Explanation

• Makki Surahs: 86
• Madani Surahs: 28
• Total Surahs: 114
• Makki Period: ~13 years
• Revelation Place: Makkah

Additional information:

• Makki Surahs mainly emphasize faith (Iman)
• Madani Surahs focus on law and social system
• First revelation occurred in Hira Cave (610 CE)
• Last revelation completed in 632 CE
• Quran contains 11 Sajdah in Makki Surahs and 3 in Madani Surahs

Last verified on 17-05-2026

Explanation