Download DBATU B-Tech 1st Year 2017 Oct Engineering Chemistry Question Paper

AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE

Mid Semester Examination — October - 2017

Branch: F. Y. B. Tech (Group B) Sem.- I

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Subject with Subject Code:- Engg. Chemistry (CHM103) Marks: 20

Date:- 4/10/2017 Time:-1 Hr.

Instructions:-All questions are compulsory.

Que. No. 1 Multiple Choice Questions. (06)

1. For regeneration of Zeolite ________ solution is used.
   1. HCl

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   2. NaOH
   4. NaCl
2. To remove temporary hardness of water ________ is used.
   1. MgCl2
   2. CaCl2

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   3. Ca(OH)2
   4. Mg(HCO3)2
3. If only one Phase is present in one component system then the no of degree of freedom will be ~~~
   1. 0
   2. 1

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   3. 2
   4. 3
4. Which indicator is used to determine COD ________:
   1. Starch
   2. ferroin

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   3. Methyl orange
   4. none
5. In Pb-Ag alloy system ________ is the temperature at Eutectic point.
   1. 303°C
   2. 300°C

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   3. 325°C
   4. 350°C
6. In water system, the curve which represent equilibrium between ice and water vapour is called ________
   1. Vaporisation curve
   2. Sublimation curve

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   3. fusion curve
   4. None

Que. No. 2 Attempt any one of the following: (06)

1. Define softening of water. Explain Zeolite process of softening of water with its advantages and disadvantages.

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2. Draw Phase diagram of Sulphur system and explain the curves, areas and triple points in it.

Que. No. 3 Attempt any two of the following (08)

1. Write a note on Chemical Oxygen Demand (COD).
2. What is Phase rule equation? Explain the term Phase involve d in Phase rule equation.
3. Explain types of water.

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