Class 9 Chemistry *ताबड़ तोड़* MCQs | Paper Yahi se Banega | All MOST IMPORTANT Qs | 🔴 LIVE

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Timestamps for Questions That May Help❤ Question 1: 9:08 🧪 Discussion on the law of conservation of mass. Question 2: 10:14 ⚛ Explanation of reactants and products in a chemical reaction. Question 3: 11:21 🔄 Understanding physical changes with examples. Question 4: 16:46 📏 Explanation of the law of constant proportion. Question 5: 20:30 🌟 Understanding elements and their chemical properties. Question 6: 22:33 🧬 Discussion on atoms of the same element being identical. Question 7: 58:54 🧫 Understanding atomicity and its significance. Question 8: 1:15:09 🧮 Explanation of the mole concept. Question 9: 1:17:24 ⚖ Understanding molar mass and its calculation. Question 10: 1:18:50 🧑‍🔬 Formation and understanding of chemical formulas. Question 11: 1:19:32 🔬 Discussion on the concept of a mole. Question 12: 1:21:12 🧊 Understanding molar mass and its conversion. Question 13: 1:22:43 🧪 Calculation of the number of moles from a given mass of substance. Question 14: 1:24:34 🧫 Discussion on adding 10 grams of silver nitrate solution to 10 grams of sodium chloride. Question 15: 1:25:05 ⚗ Understanding changes in mass during chemical reactions. Question 16: 1:26:31 🧬 Explanation of the composition of molecules. Question 17: 1:27:22 🌡 Understanding the difference between O2 and O3 molecules. Question 18: 1:28:40 🧪 Discussion on atomic and molecular mass. Question 19: 1:29:24 ⚛ Explanation of reasons behind ionic compound statements. Question 20: 1:30:44 🔬 Understanding atomic and molecular mass. Question 21: 1:31:21 🧫 Discussion on the formation of hydrogen sulfide. Question 22: 1:32:59 🧪 Explanation of magnesium chloride and sodium carbonate. Question 23: 1:33:02 🧬 Understanding polyatomic ions and their valencies. Question 24: 1:33:59 ⚗ Discussion on the valency of atoms and molecules. Question 25: 1:34:45 🧪 Explanation of chemical formulas and valency. Question 26: 1:35:37 🧬 Understanding the formulas and valency of sodium bicarbonate. Question 27: 1:36:34 🧫 Discussion on the phosphorus ion and its valency in sodium phosphate (Na3PO4). Question 28: 1:37:58 ⚛ Explanation of the concept of a mole. Question 29: 1:38:45 🧪 Understanding the number of particles in a mole. Question 30: 1:39:22 🧬 Calculation of molar mass and its conversion. Plzzz Hit A Like👍 If This Helped😊

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1 comment 😂😂😂😂 1:06:02

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9:21 video starts

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5:06 5:08 5:09 5:10 5:12 5:13 5:13

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1:02:39 sir The valency of oxygen will -2 not 2 !!!

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Bro, the valency would be 2 not -2

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@MusicAngel_83 bro the valency will be -2 because oxygen is a anion and non metal as well as it forms acid!!!

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In Question 11, you've not clarified that 1:8 is 36:18 In question 11, You've not clarified that ratio is by mass or by number of atoms. By number, it's 2:1. Therefore answer must be (D)

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83 comment

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