Download OU B.Pharma 2-1 Year 2018 13035 NON CBCS Pharmaceuticals Analysis I (Chemical Analysis) Question Paper

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B. Pharmacy 2/4 | Semester (Non CBCS) (Backlog) Examination, November 2018

Subject : Pharmaceuticals Analysis — I (Chemical Analysis)

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Time : 3 Hrs Max. Marks: 70

Note: Answer all questions. All questions carry equal marks.

1. 1. (i) Define the following:
      (A) Accuracy (B) Precision (C) Standard deviation (6)
      (ii) What are significant figures? Write the rules for computation. (8)

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   2. OR
   3. (i) Define the following: (4)
      (A) Normality (B) Molarity (C) Molality (D) Detection limit
      (ii) Describe the procedure for calibration of pipettes and burettes (10)

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2. 1. (i) Explain the neutralization titration curve for the reaction between strong acid and strong base. Comment on the indicators used. (10)
      (ii) Write the derivation of Henderson-Hesselbalch equation used for the determination of pH. (4)
   2. OR
   3. (i) Explain the following: (6)
      (A) Law of mass action (B) Ionic product of water
      

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      (ii) Write a brief note on hydrolysis of salts. (8)
3. 1. (i) Discuss the various methods used in determination of end point in precipitation titration. (8)
      (ii) Write a note on organic precipitants. (6)
   2. OR

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   3. (i) Discuss the various types of redox-titrations giving suitable examples. Write reaction equations wherever necessary. (10)
      (ii) Write the factors affecting the precipitation titrations. (4)
4. 1. (i) Discuss the principle and theory of complexometric titration. Write a note on metal ion indicators. (4+4)
      (ii) Write the procedure for the preparation and standardization of 0.1 N perchloric acid. (6)

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   2. OR
   3. (i) Discuss the principle and procedure involved in argentometry. (10)
      (ii) Explain the principle of non-aqueous titrations. (4)
5. 1. (i) Define the terms limiting reactant, theoretical yield and percentage yield. (6)
      

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      (ii) Balance the following equations. (4)
      (A) BaCl₂ + NaOH ? Ba(OH)₂ + NaCl
      (B) H₂SO₄ + FeCl₂ ? Fe₂(SO₄)₃ + HCl
      (iii) Calculate the number of moles in each of the following: (4)
      (A) 7.9 g of calcium (B) 65.5 g of carbon

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   2. OR
   3. (i) Write mass balance expressions for the system formed when a 0.010 M NH₃ solution is saturated with slightly soluble AgBr. (8)
      (ii) Find the percent composition of element calcium in calcium hydroxide. (6)

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