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Class 10th notes

Class 10th notes

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📊 مؤشرات الجمهور والحراك

منذ تأسيسه في невідомо، حقق المشروع نمواً سريعاً وجمع 23 897 مشتركاً.

بحسب آخر البيانات بتاريخ 19 يونيو, 2026، تحافظ القناة على نشاط مستقر. خلال آخر 30 يوماً تغيّر عدد الأعضاء بمقدار -645، وفي آخر 24 ساعة بمقدار -14، مع بقاء الوصول العام مرتفعاً.

  • حالة التحقق: غير موثّقة
  • معدل التفاعل (ER): يبلغ متوسط تفاعل الجمهور 13.94‎%. وخلال أول 24 ساعة من النشر يحصد المحتوى عادةً 1.01‎% من ردود الفعل نسبةً إلى إجمالي المشتركين.
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  • التفاعلات والاستجابة: يتفاعل الجمهور بانتظام؛ متوسط التفاعلات لكل منشور يبلغ 0.
  • الاهتمامات الموضوعية: يركز المحتوى على مواضيع رئيسية مثل cbse, chapter, sample, syllabus, pattern.

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بفضل وتيرة التحديث المرتفعة (أحدث البيانات بتاريخ 20 يونيو, 2026) تحافظ القناة على حداثتها ومستوى وصول مرتفع. وتُظهر التحليلات تفاعلاً نشطاً من الجمهور، ما يجعلها نقطة تأثير مهمة ضمن فئة التعليم.

23 897
المشتركون
-1424 ساعات
-1317 أيام
-64530 أيام
أرشيف المشاركات
🧠 Memory Tricks for Class 10 Science 🔥 Physical vs Chemical Changes 1. Burning → Chemical (new substance + energy released) 2. Melting/Ice → Physical (no new substance, just state change) 3. Boiling water → Physical 4. Rusting iron → Chemical (new brown flaky substance) 5. Cutting vegetables → Physical 6. Cooking vegetables → Chemical (new taste, smell, can’t reverse) 7. Dissolving salt in water → Physical (can get salt back) 8. Dissolving milk powder in water → Physical 9. Fermentation of sugar → Chemical (alcohol forms, irreversible) 10. Photosynthesis → Chemical (new glucose + O₂ formed) 👉 Shortcut: If new substance is formed → Chemical. If only appearance changes → Physical. ⚗️ Acids, Bases & Salts 1. Acid + Metal → H₂ gas (remember: “Acid attacks Metal → Hydrogen flies”) Example: Zn + H₂SO₄ → ZnSO₄ + H₂↑ 2. Acid + Base → Salt + Water (Neutralization reaction 🌊) Example: HCl + NaOH → NaCl + H₂O 3. Carbonate + Acid → CO₂ gas (remember: “C-A → CO₂”) Example: Na₂CO₃ + HCl → NaCl + CO₂↑ + H₂O 4. Bases feel soapy, Acids taste sour (don’t taste in lab 😂 just remember lemon = acid, soap = base). 5. Litmus Test: Acid → Blue to Red Base → Red to Blue 🔄 Types of Chemical Reactions 1. Combination = Coming Together A + B → AB (Example: C + O₂ → CO₂) 2. Decomposition = Breaking AB → A + B (Heat/Light/Electricity used to break down) 3. Displacement = Strong pushes Weak A + BC → AC + B (Example: Zn + CuSO₄ → ZnSO₄ + Cu) 4. Double Displacement = Exchange of Partners 💍 AB + CD → AD + CB (Example: Na₂SO₄ + BaCl₂ → BaSO₄↓ + NaCl) 5. Oxidation = Oxygen Gain / Hydrogen Loss 6. Reduction = Oxygen Loss / Hydrogen Gain 👉 Trick: OIL RIG → Oxidation Is Loss, Reduction Is Gain (of electrons). --- 🌟 Super Quick Exam Hacks Burning, Cooking, Rusting, Photosynthesis, Digestion = Chemical Cutting, Melting, Boiling, Dissolving (reversible) = Physical Color change, gas formation, heat/light, precipitate = Always Chemical Reaction sign

This question may look very easy, but I’ve seen many students making mistakes in it. Always remember these two keywords:
👉 Burning = Chemical reaction 👉 Melting = Physical reaction
Now, in this question they are asking about burning, so the correct answer will be Chemical Reaction.

Above are all the previous year questions of chapter 1 chemical reaction and questions 👆

Why is cellular respiration considered an exothermic process?
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When dilute hydrochloric acid reacts with copper oxide powder, a blue-green solution forms. What is the new compound responsible for this color?
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Which of the following equations for the reaction of iron with steam is correctly balanced?
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What is the correct coefficient for FeSO₄ when the equation is balanced: FeSO₄(s) → Fe₂O₃(s) + SO₂(g) + SO₃(g)?
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Which set of coefficients correctly balances the equation: Al(s) + CuCl₂(aq) → AlCl₃(aq) + Cu(s)?
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Identify the type of reaction: 2H₂(g) + O₂(g) → 2H₂O(l)
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Identify the type of reaction: Fe(s) + CuSO₄(aq) → FeSO₄(aq) + Cu(s)
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Identify the type of reaction: Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq)
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Select the correctly balanced equation for the thermal decomposition of lead(II) nitrate.
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Complete and balance the following reaction: Fe₂O₃ + Al →
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Which option shows the correctly balanced equation with physical states for the reaction between aqueous silver nitrate and aqueous sodium chloride?
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What happens when white silver chloride is exposed to sunlight, and what type of reaction is this?
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On what fundamental principle is the balancing of chemical equations based?
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Which of the following is a balanced equation for a double displacement reaction?
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How are oxidation and reduction defined in terms of oxygen or electrons?
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What happens chemically when quicklime (calcium oxide) is added to a bucket of water?
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What is the main difference between an endothermic and an exothermic reaction?
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