Professor Noor Saleem PNS Academy

07/08/2026

07/08/2026

⚛️ Chemistry Concept Check! 🧪

Why does an electron have a higher charge-to-mass ratio than a proton? 🤔

Do you know the reason?

💬 Write your answer in the comments before checking the explanation!

A useful conceptual question for Grade 11 & 12 Chemistry students to strengthen their understanding of atomic structure.

📚 Learn the concept, not just the formula!

02/08/2026

Chemistry Concept of the Day!
Why is hexa-1,3-diene more stable than hexa-1,2-diene?
👉 Because conjugated double bonds allow electron delocalization, making the molecule more stable than a cumulated diene.

01/08/2026

Chemistry Challenge!
Which molecule has the higher bond energy: F₂ or H₂?
Can you guess the correct answer before reading the explanation in the first comment? Test your chemistry concepts and share your answer in the comments! 👇
Perfect for Class 11 & 12 (FSc/Intermediate) students.

31/07/2026

Want to understand chemistry in a super easy way? 🧪✨Today’s topic: Why are organic reactions slower than inorganic reactions?

We explained it in simple words so you can quickly revise and remember for exams! 📚

✅ Perfect for Class 11 & 12 (FSc/Intermediate) students✅ Easy notes for quick learning✅ Great for exam preparation

Save this post 💾 and share it with your friends to help them too! 👩‍🎓👨‍🎓

29/07/2026

Why is Carbon-12 the standard for atomic masses? 🤔
It's one of the most important concepts in Grade 11 & 12 Chemistry—and one of the most frequently asked exam questions!
Can you explain why scientists chose Carbon-12 instead of Hydrogen or Oxygen? Drop your answer in the comments before checking the explanation!
📚 Learn Chemistry with Professor Noor Saleem.

28/07/2026

Chemistry Challenge!
Why is water a stronger acid than ethanol? 🤔

Can you explain the reason before checking the answer? Test your concepts and see if you're ready for your Board Exams!

Answer is in the first comment.

Follow for more Grade 11 & 12 Chemistry questions, concept builders, and exam tips.
Professor Noor Saleem

24/07/2026

Grade 11 Chemistry | Organic Chemistry | MDCAT Preparation
A simple-looking question, but don't answer it too quickly!
Many students know the definitions of tetravalency and catenation, but only a few can identify which property is primarily responsible for the enormous variety of organic compounds. Think conceptually before answering.

22/07/2026

Tricky Chemistry Concept Alert!
Most students get this wrong on Board Exams and Entry Tests (MDCAT/ECAT). Test your knowledge below! 👇

16/07/2026

MDCAT/ECAT Chemistry Challenge! 🔥
Think you know Organic Chemistry? Test your concepts with today's MCQ!
❓ Why is phenol more acidic than ethanol?
💬 Comment your answer before checking the first comment.
🏆 Challenge your friends and see who gets it right