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Very Short Answer Type Questions7. Why do we need to balance a chemical equation?8. What do you mean by aqueous solution?9. Why is souring of milk a chemical change?10. Why do we store silver chloride in a dark colouredbottle?11. Why do we add a few drops of dilute sulphuricacid to water prior to electrolysis? |
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Answer» Answer: 7.The chemical EQUATION needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the PRODUCTS side. Balancing chemical equations is a PROCESS of trial and error. 8.A solution which contains water as a component of it is called as aqueous solution. 9.The souring of milk is a chemical reaction. Milk that is spoiled is sour, with a foul taste and odor. ... As bacteria consume the lactose, these sugar molecules UNDERGO a chemical reaction to become transformed into lactic acid. 10.Silver CHLORIDE is stored in dark coloured bottles because it reacts with sunlight and decomposes to form silver and chlorine gas. So to prevent this it is stored in dark coloured bottles. the type of reaction is photolytic decomposition reaction. 11.To increase the conductivity of water a few drops of sulphuric acid is added being a strong acid it can ionize completely ... |
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