Maharashtra State Board of Technical Education 2011-1st Sem Diploma Civil Engineering for All Branches of in EngineeringSubject :- basic chemistry(12002) - Question Paper
MSBTE ques. paper for All Branches of Diploma in Engineering
First Semester
Subject :- basic chemistry(12002)
12002
21011 r-T-I-T-I-T-I-T-.
Instructions - (1) All Questions are compubory.
(2) Illustrate your answers with neat sketches wherever necessary.
(3) Figures to the right indicate full marks.
(4) Assume suitable data, if necessaiy.
(5) Use of Steam tables, logarithmic. Molhers chart is permitted.
Marks
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Attempt any TEN of the following : | |
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a) |
State Hunds rule of multiplicity. |
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b) |
Differentiate between atomic No. and mass No. |
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c) |
State Faradays Pl law of electrolysis. |
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<*) |
State factors affecting degree of Ionisation. |
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e) |
Define atom and ion. |
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f) |
Explain the term gangue and flux. |
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g) |
Define mineral and ore. |
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*) |
Give names of synthetic rubbers. |
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i) |
Define thermal insulators. |
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j) |
Define pollution and pollutant. |
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k) |
Define BOD of sewage. |
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i) |
List four particulates responsible for pollution. |
P.T.O.
12002 [2]
Marks
2. Attempt any FOUR of the following : 16
a) Write four assumptions of Bohr's atomic theory.
b) Write electronic configuration of following element Na23.
C135, 13Ma , 10Ne2.
c) Explain formation of CaCL, molecule with help of diagram
d) Give difference between Isotope and Isobar.
e) Explain Afbaus principle.
f) Explain Arrhenius theory of dissociation.
3. Attempt any FOUR of the following : 16
a) Explain construction and working of dry cell.
b) Explain the mechanism of elecrolysis of NaCl solution by platinum electrode.
c) Explain construction and working of lead-acid storage cell.
d) A current of 3 amperes passing through silver nitrate solution for 20 minutes deposit 4.09 of silver. What is the E.C.E. of silver.
e) Explain electroplating process with example.
f) Explain oxidation and reduction potential.
4. Attempt any FOUR of the following : 16
a) Define the terms Ductility, Tensile strength, Weldability.
b) Give composition properties and uses of Duralumin.
c) Explain froath floatation process.
d) What are the purposes of making alloy.
e) Differentiate between calcination and roasting.
f) Explain fusion method of making alloy.
12002 [3]
Marks
5. Attempt any FOUR of the following : 16
a) Describe the vulcanisation of robber.
b) Differentiate between thermosetting and thermosoftening plastic.
c) Explain compoundings of plastic.
d) Give properties and uses of thermocole.
e) What are drawbacks of natural rubber.
f) Explain pollution due to IC engine.
6. Attempt any FOUR of the following : 16
a) Explain ozone depletion.
b) Write preventive measures of water pollution.
c) Give the role of forestation and green cover in environmental management (PEM)
d) What are the types of w'aste ? Give the origin and effect of E-waste.
e) Explain the term COD.
f) Explain Green House effect.
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Attachment: |
| Earning: Approval pending. |
