Shivaji University 2011-1st Sem B.Tech Chemical Technology of chemistry F.Y..&2,,kolhapur - Question Paper
N - 1227 -2- liMMHIIIIftll
True or False :(one mark each)
i) Temporary hardness is due to dissolved bicarbonates.
ii) Beer-Lamberts law can be verified by plotting Absorbance against concentration.
iii) SiC>2 cannot be used as adsorbent in chromatographic separations.
iv) The composition of Nichrome is 80% Ni and 20% Cr.
B) Solve any two (three marks each) :
i) What is softening of water 9 Name various softening methods.
ii) What are the limitations of quinhydrone electrode ?
iii) What is brass ? State composition and uses of various types of brasses.
iv) What are refractories ? What are the properties of a good refractory material ?
2. a) Discuss the cold lime soda process for treatment of water and explain its
advantages and disadvantages. 8
b) A sample of water was found to contain Ca (HC03)2 - 36.0 mg/1. MgS04 - 8.0 mg/1, CaS04 - 11.0 mg/1 and Mg (HCO3)2 - 23.0 mg/l. Calculate the temporary, permanent and total hardness of the sample. (Atomic weights of Ca, Mg S,C,0 and H are 40, 24, 152, 12 an 1 respectively). 5
3. a) Explain the construction of glass electrode arid give representation of a cell
using glass electrode for determination of pH of a solution. 8
b) Explain the procedure for thin layer chromatography. 5
4. a) Define and explain refractoriness, porosity and thermal spalling of a
refractory. 8
b) What is brass ? State composition and uses of various types of brasses. 5
V
SECTION -- II
5- A) Multiple choice (one mark each) :
. i) The viscosity of a lubricant____with temperature.
a) Increases b) Docs not change
c) Decreases d) Increase and then decrease
ii) Nylon-66 is product of condensation of hexamethylene diamine with
a) Malonic acid b) Acetic acid
c) Sulphuric acid d) Phosphoric acid
iii) In anodic protection the metal to be protected is connected to a sacrificial
a) Cathode b) Anode c) Cell d) Resistance
iv) The calorific value of a fuel is the amount of heat obtainable by_
a) Complete combustion b) Reduction
e) Incomplete combustion d) Heating
True or False (one mark each) :
i) A lubricant decreases the frictional resistance between two sliding surface.
ii) Most of the silicone rubbers are very hard.
iii) Jn cathodic protection the metal to be protected is made as anode, ivj Major product of hydrogen combustion is water vapour.
B) Solve any two (Three marks each;
i) What is meant by lubrication '! State various types of lubrication.
ii) Give an account of classification of inch,
iii) Why natural rubber cannot be u',ed without vulcanization ?
iv) Explain how electroplating can be done on a metal for corrosion prevention.
6. a) With a neat diagram explain the procedure of measurement of Flash Point
and Fire Point of a lubricant.
b) Give an account of classification of lubricants with suitable examples.
7. a) Describe the method of preparation., properties and uses of phenol
formaldehyde resin.
b) Describe the experimental procedure for determining the calorific value of a fuel by Bomb calorimeter.
8. a) Discuss various factors affecting corrosion
b) Discuss the advantages and disadvantages of anodic protection.
Total Marks : 80
First Year B.Tech. (Ncmcslcr I II) l'.vmmnation, 2011 ENG11NUUKINC H MINISTRY
Day and Date : Friday, 3-6-201 I
Time : 2.30 p.m. to S.30 p.m.
Instructions : 1) Attempt twv three question fiotn Sectum I and any three
from Sen ion M.
2) Assume snitnhh1 (hud wherever neeessury.
3) Draw neat hthelnl iHoyj'tuns wherever necessary.
NICTION I
1. A) Multiple choice : (om* mark rsiolt)
i) The presence of calcium and magnesium bicarbonates in water causes
a) Temporary hardness
b) Permanent hardness
c) Both Temporary and permanent hardness
d) Turbidity
ii) In pH meter_________ electrode is used.
a) Copper b) Calomel
c) Silver
d) Glass
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iii) The silica brick is an a) Acidic c) Neutral |
refractory, b) Basic d) None of the above |
iv) The cracking of refractory at hili temperature is known as
a) Porosity
b) Stability
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Attachment: |
| Earning: Approval pending. |
