Download DBATU B.Tech 2019 Oct-Nov Chemical Engineering-CHEM 3rd Sem Chemical Process Calculation Question Paper

DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE

Mid Semester Examination – Oct 2019

Course: B. Tech in - Chemical

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Subject Name: Chemical Process Calculation

Sem: III

Subject Code:BTCH302

Max Marks: 20

Duration:-1 Hr.

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Date:-

Instructions to the Students:

1. All questions are compulsory.
2. Question one are compulsory.
3. Solve any two from question 2 and solve any one from question 3.

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4. Assume suitable data wherever required.

Q.1 Attempt following Questions.

1. N.T.P. corresponds to...... a) 1 atm.absolute pressure& 0°C b) 760 mm Hg gauge pressure & 0°C c) 760 torr & 15°C d) 101.325 KPa gauge pressure & 0°C.
2. A 'limiting reactant' is the one, which decides the __________ in the chemical reaction. a) equilibrium constant b) conversion c) rate constant d) none of these
3. Recycling in a chemical process facilitates a) increased yield b) enrichment of product c) heat conservation d) all (a), (b) &(c)

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4. 'Giga' stands for............ a) 10⁹ b) 10^-12 c) 10¹² d) 10¹⁵
5. One Newton is equal to __________ dynes a) 10² b) 10³ c) 10⁴ d) 10⁵
6. Number of gm moles of solute dissolved in 1 kg of solvent is called it's a) normality b) molarity c) molality d) formality

Q.2 Solve Any Two of the following.

1. In double effect Evaporator plant second effect is maintained under vacuum of 475 Torr (mmHg). Find the absolute pressure in Kpa, bar and psi.

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2. An aqueous solution of acetic acid of 35% concentrated by weight has density 1.04 Kg/L at 298° K. Calculate Molality, Normality and Morlality.
3. A feed to a continuous fractionating column analyses by wt 28% Benzene and 72% toluene. Analysis of distillate shows 52% Benzene and 05 % toluene was found in bottom product. Calculate amount of distillate and bottom product per 1000 Kg of feed per hour. Also calculate % recovery of benzene.

Q.3 Solve Any One of the following.

1. With neat sketch describe Recycle, Bypass and Purge Operation.
2. Pure CO2 may be prepared by treating limestone with aq. Sulphuric acid limestone containing Caco3 & Mgco3 remainder being inert insoluble material. Acid used contained 12% H2SO4 by weight. Residue from process had following composition CaSO4- 8.56%, MgSO4 5.23%, H2SO4 – 1.05%, Inerts – 0.53%, CO2- 0.12% & water 84.5%. During process mass was warmed & CO2 and water vapour are removed calculate analysis of limestone.

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