Janardan Rai Nagar Rajasthan Vidyapeeth 2006 B.Tech CHEMISTRY - Question Paper

Model Question Paper

BF2-CHEMISTRY

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

Group A (25 Marks)

Answer any three questions (Question 1 is compulsory)

 

(5)

Q.1 Calculate the temporary and permanent hardness of a sample of water

Mg (H Co3)2 - 73 mg/L , Mg Cl2 - 95 mg/L

Ca (H Co3)2 - 162 mg/L , Ca Cl2 - 111 mg/L

(10)

Ca So4 - 136 mg/L

Q.2 What are lubricants . Explain mechanism of lubricant ?

(10)

Q.3 The % analysis by volume of produces gas is

H2 = 18.3 %, CH4 = 3.4%, Co is 25.4%, Co2 = 5.1%, N2 = 47.8% Calculate

(10)

Q.4 a. Explain thermal conductivity and electrical conductivity shown by metals?

b. Write any four functions of lubricants ?

(10)

Q.5 State the Carnot Theorem . Explain the Carnot Cycle ?

 

Group B (25 Marks)

 

Answer any three questions (Questions 6 is compulsory)

(5)

Q.6 A sample of coal contains c = 60% , O = 33% , H = 6 % , S = 0.5 % , N = 0.3 %

ash = 0.2% . Calculate the higher and lower calorific values of this coal ?

(10)

Q.7 Discuss gibbs Helmohottz free energy ? Derive on expression for free energy ?

Q.8 An exhausted zeobite softener was regenerated by passing 150 litres of Nacl solution having a

(10)

strength of 150 g/l of Nacl. How many litres of hand water sample, having hardness of

600 ppm can be softened

 

Q.9 .Calculate the heat of the reaction.

C2 HH(g) + H2(g) C2H6(g) at 25C

(10)

Give that the heat of combustion of Ethylene, hydrogen and ethane are 337.0, 68.4 and

373.0 K cal

(10)

Q.10. a. What is water gas? How is it manufactured ? Give the chemical reaction in different zone

b. Explain i) Gross and net calorific value ii) Green house effect

 

 

 

Group C (25 Marks)

 

All Questions are Compulsory.

 

Q.11 Fill in the blanks ( each question carry 2 marks)

 

1. The anti knock value of n- replane is _______________

2. Silicon polymer is ____________

3. The first synthetic rubber is ______________

4. __________ process produces water of almost zero hardness.

5._________ coals should burn freely and should not be strongly caking.

 

 

Q.11 Multiple choice question. (Each question carry 2 marks)

1. Chemical composition of water gas ?

a) H₂o + Co b) Co+Cl₂ c) Co +N₂ d) None of these

2.Units of energy

a) Meter b) Calorie c) Kilogram d) Newton

3. In air the O₂ percentage is

a) 22% b) 24% c) 218% d) 230%

4.The specific heats of most lubricating oils lie in the range

i) 1.00--- 2.00 ii) .44 --- .49 iii) .60--.70 iv) None

5.Producer gas is essentially a mixture of carbon monoxide &

i) H₂ ii) O₂ iii) Cl₂ iv) N₂

 

Q.11 True or false (each question carry 1 marks).

 

1. A good Fuel should have high calorific value.

2. Natural rubber is obtained by milky emulsion called latex.

3.Ozone is a powerful disinfectant and is readily absorbed by water.

4. For effective water treatment ion exchangers should not be resistant to chemical attack.

5. When ∆G < 0 it is non-spontaneous reaction

 

 

 

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