Basic Chemistry First Semester Sample Question Paper
Course Name: All Branches of Diploma in Engineering / Technology.
Course Code : AE/CD/CE/CH/CM/CO/CR/CS/CV/DE/ED/EE/EI/EJ/EN/EP/ET/EV/
Semester : First
Subject : Basic Chemistry
Time : 3 Hours
Instructions: 1. All questions are compulsory.
2. Figures to the right indicate full marks.
3. Assume suitable data if necessary.
Q.1 Attempt any TEN of the following: 20 Marks
a) State Aufbau’s principle.
b) Differentiate between atomic number and atomic mass number.
c) Define electrolyte and non-electrolyte.
d) State Faraday’s first law of electrolysis.
e) State any two assumptions of Arrhenius theory of ionization.
f) Explain the terms gangue and flux.
g) Classify alloys with examples of each.
h) What is alnico? Write its composition.
i) Write the uses of asbestos as an insulator.
j) Name four synthetic rubbers
k) Define BOD of sewage.
l) List four particulates responsible for pollution.
Q.2 Attempt any FOUR of the following: 16 Marks
a) Write four assumptions of Bohr’s atomic theory.
b) Give four points of distinction between energy level and sub energy level.
c) Write orbital electronic configuration of following elements 13Al27, 20Ca40, 10Ne20, 16S32.
d) Describe the formation of MgO molecule with diagram and name the type of bonding.
e) Explain the terms Isotopes & Isobars with examples.
f) Define degree of ionization. Explain factors affecting the degree of ionization.
Q.3 Attempt any FOUR of the following: 16 Marks
a) Draw diagram and explain the construction of dry cell.
b) When the same amount of current was passed through the solutions of CuSO4 and ZnSO4 kept in series. 0.7 and 0.7164 Gms. Copper and Zinc was deposited on Cathode respectively. If atomic weight of Copper is 63.5, calculate the equivalent weight of Zinc.
c) Explain the mechanism of electrolysis of aqueous Copper sulphate solution using Copper electrodes.
d) Justify the Following
( i ) Copper is electro refined when used for electrical purposes.
( ii ) The object, which is to be plated, is connected to cathode of an electrolytic cell
( iii ) The colour of Copper sulphate solution fades when Platinum electrode is used.
( iv ) The process of ionization is reversible.
e) Describe the process of silver plating of Iron spoon.
f) Name the methods of refining of metal. Explain any one of them.
Q.4 Attempt any FOUR of the following: 16 Marks
a) Define the terms: Ductility, Tensile Strength, Weldability, Machinability.
b) Write composition, properties and applications of Duralumin or Monel metal
c) Explain with labelled diagram the method used for concentration of sulphide ore.
d) Distinguish between Calcinations and Roasting
e) Give characteristics of Insulating materials.
f) Explain the fusion method for the preparation of alloy.
Q.5 Attempt any FOUR of the following: 16 Marks
a) Write the principle of addition polymerization and give one example.
b) Describe the process of Vulcanization of natural rubber. Why is it necessary to vulcanize rubber?
c) How air Pollution destructs Ozone layer? Explain Green House Effect.
d) Describe the bad effects of Chemical fertilizers on the underground water
e) Give Reasons:
(i) PVC is soft where as Backelite is hard.
(ii) Fillers are added in compounding of plastic.
f) State any two properties of rubber & write its related engineering Application.
Q.6 Attempt any FOUR of the following: 16 Marks
a) Write preparation, properties & applications of thermacole.
b) Explain Air pollution due to internal combustion engine. Give any one method to control Pollution due to Auto Emission.
c) Explain causes of Water Pollution.
d) Write preventive measures of water pollution.
e) Give the role of forestation and green cover in preventive environmental management (PEM).
f) What are the types of waste? Give the origin and effect of E-waste.
Click Here To MSBTE First Semester More Sample Papers