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CBSE Pre Board Class 12 2016 : Chemistry (Kendriya Vidyalaya (KV) No. 1, Salt Lake)

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SAMPLE QUESTION PAPER CLASS XII CHEMISTRY Time: 3 hrs MM: 70 GENERAL INSTRUCTIONS: 1. All the questions are compulsory. 2. Q. No. 1 to 5 are very short answer type, carrying 1mark each. 3. Q. No. 6 to 10 are short answer type, carrying 2 marks each. 4. Q. No. 11 to 22 are short answer type, carrying 3 marks each. 5. Q.No.23 is a value based question carrying 4 marks. 6. Q. No. 24 to 26 are long answer type, carrying 5 marks each. 7. Use of calculators is not allowed, use log tables wherever required. 1. Name the non stoichiometric point defect responsible for colour in alkali metal halides. 2. What is shape selective catalysis? 3. Amongst the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields a single monochloride. 4. Give the IUPAC name and structure of the amine obtained when 3-chlorobutanamide undergoes Hoffmann bromamide reaction. 5. How many ions are produced from the complex,[Co (NH3)6]Cl2 in solution? 6. Will the elevation in boiling point be same if 0.1 mol of Sodium chloride or 0.1 mol of sugar is dissolved in 1L of water? Explain. 7. The following curve is obtained when molar conductivity ( m ) is plotted against the square root of concentration, c1/2 for two electrolytes A and B (a) How do you account for the increase in the molar conductivity of the electrolyte A on dilution.

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