Inorganic And Analytical Chemistry Rr

Set No. 1

Code No: RR10801

I B.Tech Supplimentary Examinations, Aug/Sep 2007 INORGANIC AND ANALYTICAL CHEMISTRY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) What is the principle and advantages of precipitation from homogeneous solution? (b) Calculate absorbance of 3.4 × 10−4 M colored thiocyanate complex of iron which had molar absorbivity of 3.2 × 10 at 580 nm taking path lenth as unity. [8+8] 2. (a) Define polarographic maxima.How is it eliminated in polarographic technique? (b) Describe the potentiometric titration of ferrous ammonium sulphate versus potassium dichromate. [8+8] 3. (a) Explain froath floatation process with neat sketch. (b) Write short note on:

[6] [10]

i. Levigation ii. Electro magnetic separation. 4. (a) What are the various factors which affect the calorific value of a fuel?

[4]

(b) Discuss the process of coal carbonization.

[8]

(c) Why should an ideal fuel have moderate ignition temperature?

[4]

5. (a) Explain octane number? How can octane number be improved? (b) A fuel gas in an internal combustion engine revealed the following composition by volume H2 = 45% ; CH4 = 36%; CO = 15%; and N2 = 4%; Calculate the volume of air required for combination of 100 m3 of gas. [8+8] 6. (a) Explain the difference between carbonate and non-carbonate hardness of water. [5] (b) State the harmful effects of silica present in water.

[6]

(c) Write a note on sterilization of drinking water.

[5]

7. (a) What is Segercone test and what is its importance? (b) How do you distinguish between dielectric and an insulator?

[8+8]

8. Calculate the quantities in kilograms of lime and soda required for softening 10,000 litres of water which showed the following analyses:NaCl = 5.85 PPM; KCl = 7.45 PPM; Mg(HCO3 )2 = 14.6 PPM; Ca(HCO3 )2 = 16.2 PPM; CaCl2 = 11.1 PPM; Mg(HCO3 )2 = 14.8 PPM. Given that the At.Wt. of Ca is 40, Mg is 24, Na is 23 and K is 39. [16] 1 of 2

Set No. 1

Code No: RR10801 ⋆⋆⋆⋆⋆

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Set No. 2

Code No: RR10801

I B.Tech Supplimentary Examinations, Aug/Sep 2007 INORGANIC AND ANALYTICAL CHEMISTRY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Differentiate between i. Co precipitation & Post Precipitation ii. Iodometry & Iodimetry (b) Calculate the p

H

of a 2.0 × 10

−3

M solutions of HCl.

[12] [4]

2. (a) Discuss redox titration of Mohr’s salt and Ceric ammonium sulphate by potentiometric method. (b) What is the principle of conductometric titrations ?What are its advantages? [8+8] 3. (a) Explain Bessemer converter process for manufacture of steel with diagram. [10] (b) How is steel classified? Give one example of each. 4. (a) What are the various factors which affect the calorific value of a fuel?

[6] [4]

(b) Discuss the process of coal carbonization.

[8]

(c) Why should an ideal fuel have moderate ignition temperature?

[4]

5. (a) Discuss the industrial uses of gaseous fuels.

[6]

(b) A sample of coal was found to containing the following; C=81%, H2=4.0%, O=2.0%, N=1.0%; the remaining being ash. Estimate the quantity of maximum air required for the complete combustion of 1Kg of the sample; if 40% of the excess air supplied. [10] 6. (a) Name the different units of hardness and explain their interconversion. (b) Describe the disadvantages of hard water when used for steam generation in boilers. [8+8] 7. (a) Write notes on refractories and various properties of refractories.

[10] [6]

(b) What are Askarels?

8. Calculate the quantity of lime and soda required for softening 70,000 lit of water containing: CO2 =20 mg/L; Ca(H CO3 )2 =20 mg/L; Mg(HCO3 )2 =25 mg/L; Hcl=8.4 mg/L; Al2 (SO4 )3 =40 mg/L; Mg Cl2 =12 mg/L. [16] ⋆⋆⋆⋆⋆ 1 of 1

Set No. 3

Code No: RR10801

I B.Tech Supplimentary Examinations, Aug/Sep 2007 INORGANIC AND ANALYTICAL CHEMISTRY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Write short notes on i. Digestion of a precipitate [4] ii. Deviations of Beer’s law [4] (b) The absorbtivity of a coloured complex was 3.2 × 103 at 240nm.Calculate the absorbance of a 5 × 10−5 M solution in 50 mm cell when it was measured at 240nm. [8] 2. (a) What are conductometric titrations?Give the setup for conductometric titrations.Give its advantages. (b) Write short notes on i. Overvoltage ii. Diffusion current. [8+8] 3. (a) Explain Bessemer converter process for manufacture of steel with diagram. [10] (b) How is steel classified? Give one example of each. [6] 4. (a) What are the various factors which affect the calorific value of a fuel? (b) Discuss the process of coal carbonization. (c) Why should an ideal fuel have moderate ignition temperature?

[4] [8] [4]

5. (a) What is Boy’s Calorimeter. (b) Describe its construction and working. (c) What are the calculations involved in it.

[6] [5] [5]

6. (a) How is the removal of micro-organisms in drinking water achieved. (b) Write briefly on boiler troubles. 7. (a) Classify and explain about the thermal insulators. (b) Explain in detail the refractoriness of a refractory material.

[6] [10] [8+8]

8. What is the total hardness if 0 Fr and 0 Cl for a water sample which showed the following concentrations of salts:KCl = 0.0745 gm/litre; CaSO4 = 0.0136 gm/litre; Ca(HCO3 )2 = 0.0162 gm/litre; Mg(NO3 )2 = 0.0148 gm/litre (Atomic weights of Mg, K and Ca are 24, 39 and 40 respectively) [16] ⋆⋆⋆⋆⋆ 1 of 1

Set No. 4

Code No: RR10801

I B.Tech Supplimentary Examinations, Aug/Sep 2007 INORGANIC AND ANALYTICAL CHEMISTRY (Chemical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) How is water hardness expressed? Describe the volumetric method of determining water hardness. (b) Write short notes on i. Post precipitation ii. co precipitation

[8+8]

2. (a) Define the following i. Limiting current ii. Migration current iii. E1/2 (b) What is the principle of conductometric titrations? What are its advantages? [8+8] 3. (a) What elements are added to iron to form steel? How do these contribute to improvement of the properties of steel? [6] (b) Describe the open hearth process for manufacture of steel with diagram. [10] 4. (a) What are the various factors which affect the calorific value of a fuel?

[4]

(b) Discuss the process of coal carbonization.

[8]

(c) Why should an ideal fuel have moderate ignition temperature?

[4]

5. (a) Explain the difference between straight-run gasoline and synthetic petrol [5] (b) Describe the manufacture of synthetic petrol by polymerization process.

[5]

(c) When 0.935g of a fuel underwent complete combustion in excess of oxygen, the increase of temperature of water in the bomb calorimeter containing 1365g of water was 2.40 C. Calculate the higher calorific value of the fuel, if the water equivalent of the calorimeter etc. is 135gms. [6] 6. (a) What are ion-exchange resins? Explain their types. (b) Describe the ion-exchange process for the softening of water used in boilers. [8+8] 7. (a) Explain the properties of refractoriness, thermal conductivity and porosity.[9] (b) Write a note on insulating materials.

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[7]

Set No. 4

Code No: RR10801

8. Calculate the total hardness of a sample of water in 0 Fr and 0 Cl having the following salts:Ca(HCO3 )2 = 8.1 PPM; Mg(NO3 )2 = 14.8 PPM; CaCl2 = 11.1 PPM; Mg(HCO3 )2 = 7.3 PPM. (At. Wt. of Mg is 24 and that of Ca is 40). [16] ⋆⋆⋆⋆⋆

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