Download OU B.Pharma 2-1 Year 2016 4040 Pharmaceutical Analysis I Question Paper

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Code No. 4040

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FACULTY

B. Pharmacy 2/4 | Semester (Main) Examination, November 2016

Subject : Pharmaceutical Analysis — I (Chemical Analysis)

Time : 3 Hrs Max. Marks: 70

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

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1. (a)
   1. Define the terms accuracy and precision. Explain the difference between them with suitable examples. (8)
   2. Describe different methods of expressing concentration of solutions. (6)
   OR (b)
   1. Discuss about the statistical treatment of analytical data. Write notes on rejection of doubtful value. (8)
   2. Define the following terms and give examples with required properties (6)
      1. Primary standard
      2. Secondary standard

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2. (a)
   1. Define the terms buffer, buffer action and buffer capacity. Discuss the role of buffers in pharmaceutical analysis. (3+5)
   2. Write Arrhenius theory of acids and bases. (6)
   OR (b)
   1. Explain the terms acidimetry and alkalimetry with suitable examples. (8)

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   2. Discuss the theories of neutralization indicators. (6)
3. (a) Discuss the principles involved in gravimetry. Explain about co-precipitation and post-precipitation with suitable examples. (3+6)
   1. How do you prepare and standardize 0.1 N K₂Cr₂O₇? (5)
   OR (b)
   1. Explain iodimetry and iodometry with suitable examples. Discuss the use of starch as indicator in redox titration and its limitations. (10)
   2. Write a note on drying procedures followed in gravimetry. (4)

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4. (a)
   1. Discuss the principle involved in complexometric titration. Write short notes on PM indicators. (8)
   2. Write the principle and procedure involved in estimation of magnesium sulphate. (6)
   OR (b)
   1. Write brief account on principles of gas analysis. (6)
   2. Discuss about the solvents and indicators used in non-aqueous titration. (8)

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5. (a)
   1. Define the terms: (8)
      1. Normality
      2. Molarity
      3. Theoretical yield
      4. Percentage yield

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   2. Write the mass balance equation for the following: (6)
      1. KBr + KBrO₃ ? KBr + Br₂ + H₂O
      2. CaCO₃ + HCl ? CaCl₂ + H₂O + CO₂
   OR (b)
   1. What is Avogadro's number? Write an account on determining moles of elements in compounds. (8)

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   2. Find the pH of a solution in which [H⁺] = 4.0 x 10^-8 mol /dm³ (6)

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