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!
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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
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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
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II. Black Aeroplane
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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
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Chapter 2 - The Thief's Story
https://youtu.be/yQEqYl4uz_c
Chapter 5 - Footprints without Feet
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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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