Скачать или смотреть S-Block Elements || Top 20 most imp. & repeated MCQs || Lab Assistant Chemistry | Mahaveer Galwa Sir

📌Topic: S-Block Elements Top 20 Most Repeated MCQs with Full Revision (Lab Assistant Exam Special)

📚Teacher: Mahaveer Galwa Sir

Welcome to Bright Star Academy YouTube channel. Aaj ke is important session me hum S-Block Elements ke important mcqs karenge jo bhut hi important he.
Yeh video specially Lab Assistant Exam, SSC, Railway, Police, Army, Nursing, Paramedical, ITI, NEET, JEE aur All State Exams ke liye bahut useful hai.

Is One Shot class me aapko Alkali Metals Group-1 aur Alkaline Earth Metals Group-2 ke har wo topic clear hoga jo exam me baar-baar pucha jata hai.
✅ Most Expected Questions
✅ Previous Year MCQs
✅ Short Tricks & Important Points
✅ Chemical Properties, Uses & Reactions
✅ S-Block All Concepts from Basic to Advanced


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🔥 S-Block Elements Kya Hote Hain?

Periodic table ke group 1 aur group 2 wale elements S-Block kehlate hain kyunki unka outermost electron s-subshell me hota hai.
Ye elements reactive, soft metals, aur electropositive nature ke hote hain.


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📌 Group-1 : Alkali Metals List

Atomic Number Element Name Symbol

3 Lithium Li
11 Sodium Na
19 Potassium K
37 Rubidium Rb
55 Cesium Cs
87 Francium Fr


✅ Sabse zyada reactive – Francium & Cesium
✅ Life me sabse important – Lithium & Sodium
✅ Biological importance – K and Na ions


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📌 Group-2 : Alkaline Earth Metals List

Atomic Number Element Name Symbol

4 Beryllium Be
12 Magnesium Mg
20 Calcium Ca
38 Strontium Sr
56 Barium Ba
88 Radium Ra


✅ Teeth-Bone formation – Calcium & Magnesium
✅ Fireworks & X-Ray contrast agent – Strontium & Barium


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✅ Important Properties (Exam Special)

✔ Atomic Radius trend
✔ Ionization Enthalpy
✔ Flame Test Colors
✔ Solubility Trends
✔ Oxides, Hydroxides Reactivity
✔ Compounds like NaCl, KCl, CaO, CaCO₃, MgSO₄

Example:
🔥 Potassium flame color — Violet
🔥 Sodium flame color — Yellow
🔥 Calcium flame color — Brick Red
🔥 Barium flame color — Apple Green


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✅ Essential Compounds & Uses

Compound Group Use

NaCl G1 Common salt
CaCO₃ G2 Cement, chalk
MgSO₄ G2 Medicines
NaOH G1 Soap industry
Ca(OH)₂ G2 Whitewashing



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📌 Why This Session is Important for Lab Assistant Exam?

Lab Assistant Chemistry me S-Block chapter se 3-6 marks fix hote hain ✅
Har saal PYQ me similar questions milte hain.
Isliye is video me hum zero se hero complete revision karvate hain.


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🧪 PyQ Sample Questions

1️⃣ Sodium flame color?
✔ Yellow

2️⃣ Calcium kis group ka element hai?
✔ Group-2 (Alkaline Earth Metal)

3️⃣ Lithium ka atomic number?
✔ 3

✅ Aur bhi saare important MCQs is video me milege


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📌 What You Will Learn in This Lecture

✅ S-block Intro
✅ General Properties
✅ Trends in Physical & Chemical Properties
✅ Oxides, Hydroxides, Salts
✅ Flame Test, Biological Importance
✅ Previous Year Questions
✅ Trick to memorize periodic trends


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🏆 Who Should Watch This Video?

✔ Lab Assistant Aspirants
✔ Students of Class 11th–12th
✔ Polytechnic/Paramedical Students
✔ All Competitive Exam Students


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📌 Our Goal

Aapke selection ko reality banana hi Bright Star Academy ka mission hai.
Regular classes, study material & test series ke liye channel subscribe karein ✅


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📞Contact for Paid Courses

📌 Lab Assistant Full Course
📌 Rajasthan Competition Classes



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✨ Must Watch Playlist

📌 Lab Assistant Chemistry
📌 Biology MCQ
📌 Physics Complete Revision
📌 General Science Rapid Fire


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✅Social Media Connect

📌 Instagram: @brightstaracademy (user update kare)
📌 Telegram Channel: Join for PDFs & Notes


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🙏Thanks

Is video ko LIKE 👍 SHARE ↗ COMMENT 💬 aur SUBSCRIBE ✅ zarur karein!
Aapka support hume aur behtar content banane ke liye motivate karta hai ❤️


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