GTU Chemistry - June 2014 Exam Question Paper

GTU First Year Engineering (Semester 2)
Chemistry
June 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question from Q1 (a), (b) & Q1 (c), (d)

1 (a) 1 The nucleus of an atom consists of A) electrons and neutrons.
B) electrons and protons
C) protons and neutrons
D) All of the above

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1 (a) 10 Which acid is present in lemon?
A) Marlic acid
B) Citric acid
C) Lactic acid
D) Tartaric acid

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1 (a) 11 Which metal is heaviest?
A) Osmium
B) Mercury
C) Iron
D)
Nickle

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1 (a) 12 Nail polish remover contains?
A) Benzene
B) Acetic acid
C) Acetone
D) Petroleum ether

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1 (a) 13 pH of blood is ? A) 10.4
B) 9
C) 7.4
D) 4

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1 (a) 14 Biogas majorly contains?
A) Ethane
B) Methane
C) Hydrogen
D) CO

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1 (a) 2 The number of moles of solute present in 1 kg of a solvent is called its
A) molality
B) molarity
C) normality
D) formality

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1 (a) 3 The most commonly used bleaching agent is
A) alcohol
B) carbon dioxide
C) chlorine
D) sodium chlorine

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1 (a) 4 Give IUPAC nomenclature for following compounds. BrCH₂-CH₂-CH₂-CH₂COOH
A) 1-bromo 5- pentanoic acid
B) 4-bromo 1-carboxylic acid butane
C) 5-bromo pentanoic acid
D) none of above

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1 (a) 5 10 ppm = ______ °Fr
A) 5 B) 10 C) 1 D) 0.7

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1 (a) 6 What happens when hard water was used in Boiler?
A) Boiler corrosion
B) Scale and sludge
C) Priming and forming
D) All of above.

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1 (a) 7 Write chemical formula for Potassium chromate.
A) KmnO₄
B) K₂CrO₄
C) K₂Cr₂O₇
D) None of above.

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1 (a) 8 The material which can be deformed permanently by heat and pressure is called a
A) Thermoplastic
B) Thermoset
C) Chemical compound
D) Polymer

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1 (a) 9 The method that cannot be used for removing permanent hardness of water is
A) Adding sodium carbonate
B) Distillation
C) Adding caustic soda
D) Boiling

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2 (a) Write short note on
1. Purposes of Alloy making.
2. Give any one method for Desalination of Brackish water

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2 (b) A Sample of water on analysis was found to contain the following impurities:
Ca(HCO₃)₂=32.4 mg/L, Mg(HCO₃)₂=14.6 mg/L, CaSO₄=6.8 mg/L, MgSO₄=6.0 mg/L. Calculate temporary, permanent and total hardness in ppm, °CI and °Fr.[Molecular Mass: Ca(HCO₃)₂=162 m/mole, Mg(HCO₃)₂=146 g/mole, CaSO₄=136 g/mole, MgSO₄=120.]

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3 (a) Describe the mechanism of Electrochemical corrosion by hydrogen evolution and oxygen absorption.

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3 (b) Give monomers of Nylon 6, 6 and Bakelite. Differentiate between Thermoplastic and Thermosetting polymers

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4 (a) What is Corrosion? Differentiate between Dry and Wet corrosion.

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4 (b) What is CNG? Give advantages and disadvantages of Gaseous Fuel.

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5 (a) Explain Setting and Hardening process of Portland cement.

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5 (b) Enlist disadvantages of Natural Rubber. Explain Vulcanization process of Rubber.

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6 (a) What is the composition of Portland Cement? Discuss the manufacturing process of Portland cement.

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6 (b) What are the significances of Biogas? Give manufacturing process of Biogas.

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7 (a) Describe Manufacturing process of Acetic acid by fermentation

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7 (b) Write a short note on.
1. Natural & Artificial Abrasive.
2. pH & its measurement.

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