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July 4th, 2014, 10:18 AM
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Will you please provide me the GUJCET Chemistry Previous Years Question Paper????????? As per your request here I am sharing the GUJCET Chemistry Previous Years Question Paper: Q. 7. Amount of oxalic acid present in a solution can be determined by its titration with KMnO4solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl i. reduces permanganate to Mn2+. ii. oxidises oxalic acid to carbon dioxide and water. iii. gets oxidised by oxalic acid to chlorine. iv. furnishes H+ ions in addition to those from oxalic acid. Q. 10. Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly? i. Metal sulphides are less stable than the corresponding oxides. ii. CO2is more volatile than CS2. iii. Metal sulphides are thermodynamically more stable than CS2. iv. CO2is thermodynamically more stable than CS2. Remaining questions are in the attachment, please click on it…………. Last edited by Anuj Bhola; October 31st, 2019 at 03:56 PM. |
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