North Maharashtra University 2008 B.E Engineering Chemistry I, F.Ecommon - Question Paper
NORTH MAHARASHTRA UNIVERSITY
MAY 2008 examination
SUB: Engineering Chemistry I.
YEAR: first year of engg. (1st semester)
Max. Marks: 50.
Time: two hrs.
ENGINEERING CHEMISTRY I MAY - JUNE 2008
? IWo Houn__Pa.<ye < * - _ Mm Mark* :
Instructions to Candidates :
1. Do not write anything on question paper except Seat No.
2. All question are compulsory
3. Neat and labelled diagram must be drawn whrever necessary.
4. Assume suitable data if necessary.
5. Use of non programmable electronic calculator is allowed
6. Figures to the right Indicate full marks.
Solve any two of the following 10
a) Distinguish between electrovalent compound and covalent compound
b) Explain the structure and bonding in metallic compkx of Fe any two examples
c) Explain the sp3 hybridisation with suitable example
Solve any two of the following. 10
p) Explain the method for the estimation of chlorides
q) Define hard water. How the water becomes hard ? What Is the action of hard water on the soap ?
r) Calculate the amount of lime (90% pure) and soda
(92% pure) for the treatment of 30,000 liters of water having
the analysis as follows.
C0CO3 -10.5ppm mgiHCOsh -12 ppm CaCl2ml5.6ppm mgCOj 8.6 ppm C02"l0ppm. NaCI20ppm.
-............................_ FE (Sem-0NM U
Solve any two of the following, 10
d) Explain the boundary lubrication.
) Explain thc vteocity and viscocity index. How is it determined by Redwood viscometer,
ft Name the semisolid lubricants and mention the conditions under which semi-solid lubricants are used.
Solve any two of the following. 10
s) State and derive the equation for Faraday's laws of electrolysis, t) Write a note on single electrode.
u) State the ostwald's dilution law and verify it for the weak base. Solve any two of the following
i) Define buffer Explain the mechanism of ectdic buffer action.
)} Distinguish between electrolytic and electrochemical cells, k) Explain Co-ordinate covalent bond. Give its important features I) Explain the following metallic properties
a) Electrical conductivity,
b) Melting point
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