Top Class 10 Science Chemical Reactions & Equations: Essential Questions & Answers 📚

Prepare effectively for your exams with the most important questions and answers on chemical reactions and equations for Class 10 Science. Follow our Instagram for updates and check out the 1-month complete syllabus strategy for Class 12 and Class 10!

Simran Sahni547.6K views9:01

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Instagram link :https://instagram.com/sii_sahni/ CLASS 12 1 MONTH SYLLABUS COMPLETE STRATEGY- https://youtu.be/Fye19akA1pM CLASS 10 1 MONTH SYLLABUS COMPLETE STRATEGY- https://youtu.be/oXocTwJmK-U WINTER STUDY TRICK -https://youtu.be/MVJHicTINnM STUDY TIPS BY SIMRAN SAHNI: https://www.youtube.com/playlist?list=PLlz6Wm71kc1K-DHSvFWn5idTwuGBEZkoL CLASS 10 SST BY SIMRAN SAHNI: https://www.youtube.com/playlist?list=PLlz6Wm71kc1I-p06WfqBJVHWkzrVzGQKF CLASS 10 ENGLISH BY SIMRAN SAHNI: https://www.youtube.com/playlist?list=PLlz6Wm71kc1JdI3stlp-V12OiC7GQ2LbA CLASS 10 SST REVISION BATCH: https://www.youtube.com/playlist?list=PLlz6Wm71kc1JvcymoVkGPO4hxsL6RWXz3 CLASS 10 SCIENCE MODT IMPORTANT QUESTIONS WITH ANSWERS: https://www.youtube.com/playlist?list=PLlz6Wm71kc1IpJISmWUZA7KDaJBMm79z Class 12 ENGLISH 2020-21 FULL SYLLABUS: https://www.youtube.com/playlist?list=PLlz6Wm71kc1JAhqScEJiCgfdSjlRkc1mu CLASS 12 ENGLISH REVISION BATCH: https://www.youtube.com/playlist?list=PLlz6Wm71kc1KCCHJZ4I49qIfgHNicq_4z INDIAN ECONOMY CLASS12: https://www.youtube.com/playlist?list=PLlz6Wm71kc1Kx8Yd9F43JVLxwunEyJdCJ CLASS 12 HISTORY BY SIMRAN SAHNI: https://www.youtube.com/playlist?list=PLlz6Wm71kc1ItNze2AXyinKqDLCdokJa5 REVISION+BATCH CLASS12 HISTORY: https://www.youtube.com/playlist?list=PLlz6Wm71kc1IYJYJq-RMrisMzgbVAq9hF Political Science class 12 2020 by Simran Sahni: https://www.youtube.com/playlist?list=PLlz6Wm71kc1Jl1jBiKHguA0LXExKAqdQ7 CLASS 12 POLITICAL SCIENCE REVISION BATCH: https://www.youtube.com/playlist?list=PLlz6Wm71kc1I-6N9ih1NsF9WD9vpAtKjv class 12 macro economics: https://www.youtube.com/playlist?list=PLlz6Wm71kc1KfUfRXjookRk9qss1fCeWw Links to all Chapter of class 10 ENGLISH Chapter 1 - A Letter to God https://youtu.be/M8o7MyNC4Fw Dust of Snow https://youtu.be/c-iRXX1ORw8 Fire and Ice https://youtu.be/90D2soWIHjM Nelson Mandela: Long Walk to Freedom https://youtu.be/hVQmUdjtLzI A Tiger in the Zoo https://youtu.be/iM-d0hgKjLQ Two Stories about Flying 32 I. His First Flight https://youtu.be/6iSTowiSkYs II. Black Aeroplane https://youtu.be/zCJXBNawzp8 From the Diary of Anne Frank https://youtu.be/fIflTEnGr2Q Amanda! https://youtu.be/ptm1JW0NNCs The Hundred Dresses–I https://youtu.be/XB6cnfg_t68 The Hundred Dresses–II https://youtu.be/CaeXaJzzZqM A Baker from Goa https://youtu.be/E9iXTy0I0Kw Coorg https://youtu.be/q7iGLqatzRY III. Tea from Assam https://youtu.be/Y99a9pjyniU Madam Rides the Bus https://youtu.be/m92TrJ25mK4 The Sermon at Benares https://youtu.be/EJkPZWC_nxg Chapter 1 - A Triumph of Surgery https://youtu.be/zuBL_VlCadA Chapter 2 - The Thief's Story https://youtu.be/yQEqYl4uz_c Chapter 5 - Footprints without Feet https://youtu.be/xFz1CDyfYWU Chapter 7 - The Necklace https://youtu.be/BB8-6PbelPg Chapter 6 - The Making of a Scientist Chapter 8 - The Hack Driver Chapter 9 - Bholi Why does the colour of copper sulphate solution change when an iron nail is dipped in it? Write chemical equation for the reaction involved. AnswerIron is more reactive than copper so it displaces copper from copper sulphate solution and forms iron sulphate, hence the colour of solution changes Equation: Fe + CuSO4 (aq) → FeSO4 (aq) + CuO a) Explain the term "rancidity." Name the type of chemical reaction responsible for causing rancidity and define it. (b) Write three methods for preventing rancidity of food.AnswerWe have seen food getting contaminated and having an unpleasant smell if it is left open in summer. In a hot weather, Oil present in food get oxidized and become Rancid. Such food is not recommended for consumption. The food is getting oxidized so the reaction is oxidation reaction.Methods for preventing food from getting oxidized are:-(a) Food is kept in cool place like refrigerator.(b) Packaging should be air tight(c) Antioxidants should be added to food What happens chemically when quick lime is added to water? Ans. When quick lime is added to water calcium hydroxide (slaked lime) is formed with a hissing sound and lot of heat is evolved during the reaction. The reaction involved is CaO (s) + H2O(Quick Lime) Ca (OH) 2 (s) + Heat (Shaked Lime) Why should a magnesium ribbon be cleaned before burning in air? Ans. Magnesium ribbon is cleaned before burning to remove the protective layer of basic magnesium carbonate from the surface of magnesium ribbon. Give an example of a double displacement reac।। Solution: Reaction Between silver nitrate (AgNO3) and Sodium chloride (NaCl) is an example of double displacement reaction. During the reaction negative and positive ions trade positions as a result in the formation of white silver chloride precipitate. The chemical reaction is given below. Ag+ + NO3– + Na+ + Cl– → AgCl + Na+ + NO3–

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