Chapter 4 MCQs Solved ✅ | Stoichiometry | Class 9 Chemistry | Punjab Board | Lec12

Description: 📚 Complete Lecture Series: 📌 Class 9 Chemistry | Complete New Book (Chapters 1-13) | Punjab Board 🔥📘 👉 Watch the full playlist here:    • Class 9 Chemistry | Complete New Book (Cha...   In this lecture, we solve Exercise MCQs on Stoichiometry, covering: ✔️ Mole concept and atomic mass calculations ✔️ Empirical and molecular formulas ✔️ Moles and mass relationships in chemical reactions ✔️ Stoichiometric calculations for various compounds 📌 Exercise MCQs Discussed: 1️⃣ How many atoms are present in 1 gram of H₂O? ✅ Correct Answer: A) 1.002 × 10²³ 2️⃣ Which is the correct formula of calcium phosphide? ✅ Correct Answer: D) Ca₃P₂ 3️⃣ How many atomic mass units (AMU) are there in one gram? ✅ Correct Answer: C) 6.022 × 10²³ AMU 4️⃣ What is the empirical formula of 2-hexene (C₆H₁₂)? ✅ Correct Answer: D) CH₂ 5️⃣ How many moles are there in 25 g of H₂SO₄? ✅ Correct Answer: C) 0.255 moles 6️⃣ A necklace has 6 grams of diamonds in it. What is the number of carbon atoms in it? ✅ Correct Answer: D) 3.01 × 10²³ 7️⃣ What is the mass of aluminum in 204 g of aluminum oxide (Al₂O₃)? ✅ Correct Answer: D) 108 g 8️⃣ Which of the following compounds has the highest percentage of nitrogen by mass? ✅ Correct Answer: B) N₂H₄ 9️⃣ When one mole of each of the following compounds reacts with oxygen, which will produce the maximum amount of CO₂? ✅ Correct Answer: C) Ethane 🔟 What mass of 95% pure CaCO₃ is required to neutralize 50 cm³ of 0.5 M HCl solution? ✅ Correct Answer: C) 1.32 g This lecture is specially designed for Class 9 students under the Punjab Board system, covering: Board of Intermediate and Secondary Education, Lahore Board of Intermediate and Secondary Education, Faisalabad Board of Intermediate and Secondary Education, Multan Board of Intermediate and Secondary Education, Rawalpindi Board of Intermediate and Secondary Education, Gujranwala Board of Intermediate and Secondary Education, Bahawalpur Board of Intermediate and Secondary Education, Sargodha Board of Intermediate and Secondary Education, Sahiwal Board of Intermediate and Secondary Education, Dera Ghazi Khan ✅ Watch till the end to test your stoichiometry concepts and improve your exam preparation! 📌 Stay Connected: 👉 Like, share, and subscribe for more Punjab Board Chemistry lectures! #Class9Chemistry #Stoichiometry #MoleConcept #ChemicalEquations #PunjabBoard #NewBook2025 #ChemistryLecture #ExamPreparation #ScienceForPakistan #LahoreBoard #FaisalabadBoard #MultanBoard #RawalpindiBoard #GujranwalaBoard #BahawalpurBoard #SargodhaBoard #SahiwalBoard #DeraGhaziKhanBoard #EducationalContent #MCQs #ExamPractice #MassToMoles #AvogadroNumber