Download OU B.Pharma 2-1 Year 2018 1172 Pharmaceutical Analysis I Question Paper

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CODE NO: 1172

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FACULTY

B. Pharmacy 2/4 I Semester (Suppl) Examination, April / May 2018

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. 1. What is error? Discuss the sources of errors and suggest the remedial measures for their control. 14

   OR

   1. i) Define the following:
      1. Titration
      2. Titrant
      3. Analant

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      4. Equivalence Point 4
      ii) What is Primary Standard and secondary standard? Give examples. Write the ideal requirements of Primary Standard 10
2. 1. i) Explain the following:
      1. Common ion effect
      2. Solubility Product

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      ii) Write a note on theories of indicators used in neutralization titration.

   OR

   1. i) Discuss the modern theories of acids and bases ii) Explain the pharmaceutical importance of buffer solutions
3. 1. i) Explain the principle and various steps involved in gravimetric analysis ii) How do you prepare and standardize 0.1N NaOH

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   OR

   1. i) Write the Principle and Procedure of redox titration involving use of K₂Cr₂O₇ as titrant. 8 ii) Explain the following:
      1. Co Precipitation
      2. Post — Precipitation 6

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4. 1. i) Discuss the masking and demasking agents with their applications in complexometry. ii) Write a note on solvents used in non-aqueous titration.

   OR

   1. i) Explain the basic principles of complexometric analysis. Write the procedure for preparation and standardization of 0.1M EDTA 3+6 ii) Write the applications of non — aqueous titrations in pharmaceutical analysis 5
5. 1. i) Define the terms : 4
      1. Molecular formula

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      2. Empirical formula
      ii) Balance the following equations 6
      1. NaOH + H₂SO₄ ? Na₂SO₄ + H₂O
      2. MnO₄ +H⁺ +H₂O₂ ? Mn²⁺ +H₂O + O₂
      3. Na₂S₂O₃ + HCl ? NaCl + H₂O + SO₂
      iii) Calculate the number of moles in each of the following:
      1. 392 g of Sulphuric acid.

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      2. 9.0 g of Aluminium

   OR

   1. i) Write mass balance expressions for a 0.0100M Solution of HCl that is in equilibrium with an excess of solid BaSO₄ ii) Find the percent composition of each element in water.

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