Dr.A.P.J.Abdul Kalam University B PHARMA I SEM Pharmaceutical Analysis-I [BP102T] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University

Bachelor of Pharmacy

First Semester Main Examination, Dec-2020

Pharmaceutical Analysis-I [BP102T]

Time: 3:00 Hrs Max Marks 75

Note: - (1) All parts of the question paper are compulsory.

(2) All questions of each part to be attempt at one place.

Part-A

Q.1 Multiple Choice Questions - [1x20 = 20 Marks]

(i) Which is not compleometric indicator?

(a) Mordant black II (b) Murexide

(c) Xylenol orange (d) Methyl orange

(ii) What will be the pH at the equivalence point in the titration of a weak acid

and a strong base?

(a) 0 (b) >7

(c) 7 (d) <7

(iii) On adding a large amount of titrant, an asymptote is obtained in the titration

curve, this asymptote represents

(a) Ka of the initial solution (b) pH of the initial solution

(c) pH of the titrant (d) none of the above

(iv) The buffer region is represented by

(a) The concave curve after adding titrant

(b) The flat curve before the equivalence point

(c) The flat curve after the equivalence point

(d) The steep curve after the equivalence point

(v) Which one of the following is direct method of precipitation titration?

(a) Mohr’s method (b) Volhards method

(c) Kjeldahl method (d) Diazotization method

(vi) The pH range of methyl orange as an indicator is

(a) 3-5 (b) 8-9

(c) 2-4 (d) 6-8

(vii) The amount of NaOH used in the titration of 100 ml 0.1 N HCl is

(a) 4 g (b) 0.04 g

(c) 2 g (d) 0.4 g

Page [2]

(viii) The equivalent weight of an acid can be calculated by

(a) Molecular weight × basicity

(b) Molecular weight/basicity

(c) Molecular weight × acidity

(d) Molecular weight/acidity

(ix) The normal rain water is acidic due to

(a) SO2 (b) NO2 (c) NH3 (d) CO2

(x) Which of the following represents the equivalence point in the graph of pH

Vs volume of titrant?

(a) Point at the highest pH

(b) Point at the greatest magnitude of the slope of the curve

(c) Point at the lowest pH

(d) Point at the least magnitude of the slope of the curve

(xi) Conductometric titration of HCL and NaoH will give you

(a) S-shape curve (b) V-shape curve

(c) Dum belled shape curve (d) L-shape curve

(xii) The apparatus used in measurement of conductance is

(a) Precipitation titration

(b) Complex formation titration

(c) Displacement Titration

(d) Very weak acid and Strong base Titration

(xiii) The titration of sodium acetate Vs HCL is categories as

(a) Potentiometer (b) Wheatstone circuit

(c) Conductivity cell (d) Golay cell

(xiv) The concentration of -------------------affect iodometric titrations.

(a) Alcohol (b) Saturated organic acid

(c) Both a and b (d) Only b

(xv) The theory of conductrometry is mainly based on

(a) Ohms Law (b) Faraday Law

(c) Beers Lambert’s law (d) Ostawald Dilution Law

(xvi) In conductivity cell, the following electrode is used -

(a) Glass electrode (b) Caromel electrode

(c) Platinum electrode (d) DME

(xvii) Conductivity is a-

(a) Additional property (b) Constitutive property

(c) Colimetery property (d) Both a and b

(xviii) In potentiometry _______is measured using_______instrument

(a) pH, potentiometer

(b) Conductivity , conductometer

(c) Optical rotation , polarimeter

(d) Current , potentiometer

(xix) The inner side of glass electrode is filled with-

(a) 0.1 N HCL (b) 01N HCL

(c) 1M HCL (d) 0.1 N KCL

(xx) The standard potential of hydrogen electrode is

(a) 1 (b) 0 (c) 7 (d) 14

Part-B

Long answer questions. [2x10 = 20 Marks]

Note: Attempt any two questions. Each question carries 10 marks.

Q.1 Explain the following

(a) Standardization of 0.1 M Sodium hydroxide solution

(b) Iodometry and Iodimetry

Q.2 What is the theory of acid base titration and indicator? Explain the

 neutralization titration between acid and strong base.

Q.3 What is the principle of Polarography? Elaborate along with construction

and working of dropping mercury electrode?

Part-C

Short answer questions [7x5 = 35 Marks]

Note : Attempt any 7 questions. Each question carries 5 marks.

Q.1 Explain different techniques of analysis?

Q.2 What is Non aqueous titration and write method of estimation of sodium

 benzoate?

Q.3 Give classification of complex metric titration and brief about conduct metric  titrations?

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