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Mind shaper, (Science assignment) Chemical reactions and equations, What is a redox reaction?, , 2.  What is corrosion? Explain its advantage and disadvantage., , 3.  What is rancidity? How can we reduce the problem of rancidity?, , 4.  How is corrosion different from rusting?, , 5.  What is meant by endothermic and exothermic reactions? Give suitable example for each., , 6.  Define different types of chemical reaction and give examples for each., , 7.  Why is photosynthesis considered as an endothermic reaction?, , 8.  In electrolysis of water, why is the volume of gas collected over one electrode double that of the other electrode?, , 9.  What happens when water is added to solid calcium oxide taken in a container? Write a chemical formula for the same., , 10.  Give one use of quick lime., , 11.  Give three types of decomposition reaction., , 12.  Name the compound used for testing CO2 gas., , Q13.  What is oxidation reaction ? Give example., Q14.  Give an example of photochemical reaction., , Q15.  Give an example of a decomposition reaction. Describe any activity to illustrate such a reaction by heating., , Q16.  Why is respiration considered as exothermic process?, , Q17.  Balance the following chemical equation., ,            Fe(s) +H2O(g) = Fe3O4 + H2(g), ,            MnO2 + HCL = MnCl2 + Cl2 + H2O, ,            HNO3 + Ca(OH)2 = Ca(NO3)2 + H2O, , Q18.  On what basis is a chemical equation balanced?, , Q19.  State any two observations in an activity suggesting the occurrence of a chemical reaction., , Q20.  Name a reducing agent which may be used to obtain manganese from manganese dioxide., , Q21.  What change in colour is observed when silver chloride is left exposed to sunlight? Also mention the type of chemical reaction., , Q22.  Define a combination reaction. Give one example of an exothermic combination reaction., Q23.  What is observed when a solution of potassium iodide is added to lead nitrate solution?, ,               What type of reaction is this? Write a balanced chemical equation for this reaction., , Q24.  Distinguish between an exothermic and an endothermic reaction., , Q25.  Distinguish between a displacement and a double displacement reaction., , Q26.  Identify the type of reaction in the following:, ,               Fe + CuSO4(aq) = FeSO4(aq) + Cu(s), ,               2H2 + O2 = 2H2O, (By TUSHAR SIR)