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(d) displacement, 23. Three beakers labelled as A, B and C each containing 25 ml of water were taken. Video | EduRev is made by best teachers of CBSE/Schools. (d) SO2 + H2O → SO3 + H2, 21. (c) H2O (i) In beakers A and B, exothermic process has occurred. 3. Science Class 10 Important Questions are very helpful to score high marks in board exams. (a) (i) and (ii) 10. (d) CaCO3, 12. Corrosion Displaying top 8 worksheets found for - Balancing Chemical Equations Answer Sheet. Explaination: Reason: In this reaction HCl is oxidised to Cl2, whereas MnO2 is reduced to MnCl2. (iv) Sublimation of camphor (crystals) to a colourless compound. (b) double displacement 1. 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