CHEMICAL ENGINEERING
Paper-II

(TIme Allowed: Three Hours) (Maximum Marks .-200)
INSTRUCTIONS

SECTION-A

1. Answer any FIVE of the following in about 100 words each: 8x5=40
What is criteria for Chemical Reaction Equilibria
A solution of acetic acid (CH3COOH) in water contains 20 mole percent CH3COOH.Express the composition of the solution in weight percent (weight
Derive the following relation from fundamentals: Tds CpdT -betaVTdp.The symbols have their usual meanings.
Briefly discuss about "Effectiveness Factor".
Distinguish between ideal and non-ideal flow reactors.
Explain in brief the procedure to calculate bubble point and dew point of a given binary mixture.

2. Derive an expression for the design equation of CSTR. 15
Analyse the performance of three-CSTR in series. 15
Bring out the criteria for vapour-liquid equilibria. 10


3. Draw a diagram for binary system consisting of Benzene and Toluene at 50°C. The vapour pressures of Benzene and Toluene at 50°C are p1sat 35.98 kPa and p2sat 12·20 kPa. Using above data, calculate and tabulate isothermal data. Draw a diagram using graph paper 16

The value of equilibrium constant for chemical reaction equilibria is four at 200oC temperature and 1 atm pressure for reaction:A B C D. Calculate the value of equilibrium conversion for the above reaction under given. sets of conditions. Make suitable assumptions if required. 12

Discuss and bring ·out the significance of the terms
'Fugacity', 'Activity' and 'Chemical potential'. 12

4. Pure oxygen is mixed with air to produce an enriched air containing 60% by volume of oxygen Determine the ratio of air to oxygen used. 10
Discuss the following with suitable examples

Limiting and Excess Reactant

Recycle and Bypass Ratio

Bypass and Purge Streams. 18

Define Adiabatic Flame Temperature and show how it can be determined for a gaseous fuel burning, In air. 12


SECTION-B
5. Write on any FIVE of the following in about 100 words each: . 8x5=40
Cracking and Reforming of Petroleum Fractions

Ozone layer depletion

Pay Back Analysis

Chemicals from Coal

Emergency Planning and Disaster Management

Production of Polystyrene.


6. Describe manufacture of 'Ammonia" with a neat Process Flow Diagram. 20
Write briefly about Fire and Explosion hazards rating' with special reference "HAZOP" and "HAZAN". 20

7. Explain the thermal processes for the treatment of solid wastes. 20
What are various sources of Air Pollutants and discuss their effect on man and environment. 20

8. Give a critical account of the following:
Break Even Point Analysis
Estimation methods of fixed and working capital. 20
Explain profitability and discuss various methods for its determination. 20