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B.Sc. Ill-Semester (CBCS) Examination, November / December 2019
Chemistry (DSC)
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Paper - II
Time : 3 Hours Max. Marks: 80
PART - A (5 x 4 = 20 Marks)
(Short Answer Type)
Note : Answer any FIVE of the following questions.
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- What is Lanthanide contraction and write its consequences?
- Write a note on alkali metals in ammonia.
- Mention the products for the following reactions.
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H2O
- State Williamson's synthesis and give its reaction.
- Write a short note on the triple point of the water system.
- What is Hardy-Schultz law? Explain.
- What are fullerenes? Give two examples.
- Write the absolute configuration (R, S - configuration of the following compounds).
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OH
NH2
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PART - B (4 x 15 = 60 Marks)
(Essay Answer Type)
Note: Answer ALL from the questions
- (a) Explain how lanthanides are separated by solvent exchange method.
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OR
(b) Define symmetry and explain the types of symmetry. - (a) Write the mechanism for (i) Aldol condensation (ii) Cannizzaro reaction.
OR
(b) Explain the following tests:--- Content provided by FirstRanker.com ---
(i) 2,4 -DNP test (ii) Tollen's test (iii) Schiff's test - (a) State the Gibb's phase rule and explain the lead-silver system.
OR
(b) Explain physical adsorption and chemical adsorption. Derive Langmuir's adsorption isotherm equation and its logarithmic form. - (a) What are nanomaterials and explain the applications of nanomaterials.
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OR
(b) Explain the synthesis and applications of carbon nanotubes.
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