Question Paper: Chemistry : Question Paper Dec 2014 - First Year Engineering (Semester 1) | Gujarat Technological University (GTU)

Chemistry - Dec 2014

First Year Engineering (Semester 1)

(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.

Choose correct option from the following multiple choice questions.

1 (a) 1 Chromatography is used for the separation of
(a) Small samples of mixture
(b) Dye stuff
(c) Plant pigment
(d) All
(1 marks)
1 (a) 2 Aniline is purified by
(a) Extraction of solvent
(b) Steam distillation
(c) Vacuum distillation
(1 marks)
1 (a) 3 What is working range of UV-visible spectroscopy?
(a) 100-400 nm
(b) 400-800 nm
(c) 200-800 nm
(d) 200-400 nm
(1 marks)
1 (a) 4 Who Discover Chromatography technique?
(a) Duma's
(b) Hoffmann
(c) Victore
(1 marks)
1 (a) 5 Duma's method used for the estimation of
(a) Carbon
(b) Nitrogen
(1 marks)
1 (a) 6 Beilstein test used for detection of _______
(a) N
(b) Cl
(c) S
(d) C and H
(1 marks)
1 (a) 7 Which of the following is purified by sublimation if impurities are non-volatile?
(a) Cane sugar
(b) Naphthalene
(c) Urea
(d) Acetic acid
(1 marks)

Choose correct option from the following multiple choice questions.

1 (b) 1 How will you separate a mixture of o-nitro phenol and p- nitro phenol?
(a) Extraction of solvent
(b) Steam distillation
(c) Vacuum distillation
(1 marks)
1 (b) 2 What is the S.I unit of molarity?
(a) mol-1
(b) mol
(1 marks)
1 (b) 3 Molarity of 1N HCl solution ______
(a) 1M
(b) 2M
(c) 1M
(d) 0.5M
(1 marks)
1 (b) 4 Normality of 1M H 2 SO 4 solution _______
(a) 2N
(b) 1N
(c) 1.5N
(d) 0.5N
(1 marks)
1 (b) 5 Sooty flame suggested ______
(a) Aromatic compound
(b) CHCI3
(c) CCI4
(d) All
(1 marks)
1 (b) 6 Melting point of Benzoic acid ______ °C (a)75
(b) 187
(c) 121
(d) 44
(1 marks)
1 (b) 7 C and H are estimated by
(a) Liebig method
(b)Carius method
(c) Hofmann method
(d) Duma's method
(1 marks)

Choose the correct answer in following questions:

1 (c) 1 Which one among the following salts causes hardness to the water?
(a) Calcium carbonate
(b) Calcium bicarbonate
(c) Sodium sulphate
(d) Potassium chloride
(1 marks)
1 (c) 2 Standard Operating Procedures state that juice prepared for human consumption should be slightly acidic. Which of the following pH levels would be suitable?
(a) 4
(b) 1
(c) 7.9
(d) 6.8
(1 marks)
1 (c) 3 Lab fire extinguishers release _______ to extinguish fire (a) O2
(b) H2
(d) CO2.
(1 marks)
1 (c) 4 Which of the following compound can be purified by sublimation?
(a) Alcohol
(b) silica
(c) naphthalene
(d) glucose
(1 marks)
1 (c) 5 What would be the normality of a solution formed by dissolving 80 gm NaOH in 2 litre of water?
(a) 1 N
(b) 2N
(C) 0.5 N
(d) 1.6 N
(1 marks)
1 (c) 6 Milk of magnesia will show pH _______ in pH meter:
(b) greater than 7
(c) lesser than 7
(d) can't say
(1 marks)
1 (c) 7 In partition chromatography, stationary phase is
(a) Liquid
(b) gas
(c) solid
(d) any of these
(1 marks)
1 (d) 1 Such symbol is shown at the bottle of acetic acid. This denotes that acetic acid:
(a) radioactive
(b) Flammable
(c) corrosive
(d) caustic

  (1 marks) 1 (d) 2 The number of coordinate bonds formed by EDTA with metal cation:
(a) 7
(b) 4
(c) 6
(d) 5
(1 marks)
1 (d) 3 The pH meter reading of four aqueous solutions (W, X, Y and Z of equal concentration) is represented as pH scale as shown
What could the aqueous solutions be pH of 0.1 M NaOH is

  W X Y Z

(1 marks) 1 (d) 4 Which of the following can't be used as primary standared?
(a)Na2 CO3 (b) NaCl (c) NaOH (d) Succinic acid
(1 marks)
1 (d) 5 Novalak is ______
(a)Phenol formaldehyde resin
(b) polyurethane resin
(c) Urea formaldehyde resin
(1 marks)
1 (d) 6 In an electrochemical cell oxidation always occurs at ________
(a) anode
(b) cathode
(c) salt bridge
(d) electrolyte
(1 marks)
1 (d) 7 Brass is an alloy of ______
(a) Cu & Sn
(b) Cu & Zn
(C) Ag & Pb
(d) Cr & Al
(1 marks)
2 (a) What is green chemistry? Explain it.(3 marks) 2 (b) Explain problems which arise due to untreated hard water.(4 marks) 2 (c) Explain soda lime process for water treatment.(7 marks) 3 (a) Describe cathodic protection.(3 marks) 3 (b) Explain physical properties of metal.(4 marks) 3 (c) Discuss dry and wet corrosion.(7 marks) 4 (a) Explain vulcanization of rubber(3 marks) 4 (b) Discuss the application of polystyrene, PVC and polyethylene.(4 marks) 4 (c) What is Portland cement? Describe manufacturing of Portland cement.(7 marks) 5 (a) Define bio-technology and explain it.(3 marks) 5 (b) What are insulators? How they classified?(4 marks) 5 (c) What is fermentation? Explain enzymes and it's application in industries.(7 marks) 6 (a) Write the principle and use of IR spectroscopy.(3 marks) 6 (b) Find the minimum amount of air required for the complete combustion of 1 kg coal having the following composition by weight. C=81%, H=8%, O=5%, N=2% and remaining is ash.(4 marks) 6 (c) Give the classification, properties and applications of abrasives.(7 marks) 7 (a) Give the application of UV visible spectroscopy.(3 marks) 7 (b) Describe the process of melt spinning of fibres.(4 marks) 7 (c) What is fuel? Classify it, and write a short note on the refining of petroleum.(7 marks)

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