NTSE Chemistry: Assertion–Reason in 59 Sec 💡
❓ Question Assertion (A): Elements and compounds are examples of pure substances. Reason (R): The properties of a compound are different from those of its constituent elements. 🖼️ Question Image ✍️ Short Solution This is a pure concept + logic-based assertion–reason question . No calculation — just definition clarity + reasoning check 💯 🔹 Step 1 — Check Assertion (A) (MOST IMPORTANT 💯) Assertion: 👉 Elements and compounds are pure substances ✔️ TRUE 👉 Kyun? Pure substance ⇒ fixed composition + uniform properties Elements → same type of atoms Compounds → fixed ratio of elements 📌 Dono hi pure substances hote hain ✅ 🔹 Step 2 — Check Reason (R) Reason: 👉 Properties of compound ≠ properties of constituent elements ✔️ TRUE Example: Hydrogen → inflammable 🔥 Oxygen → supports combustion Water → extinguishes fire 📌 Completely different properties ✔️ 🔹 Step 3 — Link Between A and R 👉 Ab sabse important step: Kya R, A ko explain kar...