Chemistry - Dec 2013

First Year Engineering (Semester 1)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) 1 In detection of C and H, the line water turns milky due to presence of ______
(a) Carbon
(b) Hydrogen
(c) Calcium(1 marks) 1 (a) 2 Which of the following reagent is used for detection of Carbon and Hydrogen?
(a) Copper oxide
(b) Calcium oxide
(c) Potassium Iodide(1 marks) 1 (a) 3 Phenol formaldehyde resin is also known as _______
(a) Bakelite
(b) Orlon
(c) Malamine(1 marks) 1 (a) 4 Which of these element can be found by lessaigne test?
(a) Nitrogen
(b) oxygen
(c) hydrogen(1 marks) 1 (a) 5 Which Indicator is used for complexometric titration?
(a) EDTA
(b) EBT
(c) phenolphthalein(1 marks) 1 (a) 6 Substance which are volatile and insoluble in water are purified by ______
(a) Steam distillation
(b) Crystallization
(c) fractional distillation(1 marks) 1 (a) 7 Brass is an alloy of ______
(a) Cu and Zn
(b) Sn and Zn
(c) Fe and Zn(1 marks) 1 (b) 1 Permanent hardness is due to the presence of _______
(a) Chlorides and sulphides
(b) carbonate and bicarbonates
(c) both (a) and (b)(1 marks) 1 (b) 2 Which metal catches fire when comes in contact with water?
(a) Na
(b) K
(c) Hg(1 marks) 1 (b) 3 Which of the following process is to be carried out when two or more substances are to be separated?
(a) Crystallization
(b) Fractional crystallization
(c) sublimation(1 marks) 1 (b) 4 The process of separating volatile solid from a non volatile solid is called as ______
(a) Sublimation
(b) Filtration
(c) Crystallization(1 marks) 1 (b) 5 In purification of Petroleum, Sulphuric acid is used to separate component.
(a) Acidic
(b) Basic
(c) Both acidic and basic(1 marks) 1 (b) 6 In an electrochemical cell, the current flow from ______ to ______ pole in the external circuit.
(a) negative to positive
(b) positive to negative
(c) through the electrolyte.(1 marks) 1 (b) 7 The alloy formed by Copper and tin is known as ______ (a) Bronze (b) Brass (c) Steel(1 marks) 2 (a) Define softening of water and explain the cold lime soda process with a neat schematic diagram.(7 marks) 2 (b) What is Corrosion? Discuss the different methods to protect metals from corrosion.(7 marks) 3 (a) What are the constituents of Portland cement? Discuss the mechanism of setting and hardening of Portland cement.(7 marks) 3 (b) What is proximate analysis and ultimate analysis of coal. Discuss its significance.(7 marks) 4 (a) What are refractory? Classify the different types of refractory and state its properties.(7 marks) 4 (b) What are alloys? Give the characteristics and classification of alloys.(7 marks) 5 (a) What is vulcanization of rubber? Discuss the different application of rubber.(7 marks) 5 (b) Discuss the refining of crude oil with the help of a suitable diagram of fractional distillation column.(7 marks) 6 (a) Give the preparation and uses of Polystyrene and Nylon.(7 marks) 6 (b) What are enzymes? State its characteristics.(7 marks) 7 (a) Explain the manufacturing process of ethyl alcohol by fermentation process.(7 marks) 7 (b) What is desalination of Brackish water? Explain the method of electrodialysis.(7 marks)