GTU Chemistry - December 2014 Exam Question Paper

GTU First Year Engineering (Semester 1)
Chemistry
December 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

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 M

1 (a) 2 Aniline is purified by
(a) Extraction of solvent
(b) Steam distillation
(c) Vacuum distillation
(d)Sublimation

1 M

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 M

1 (a) 4 Who Discover Chromatography technique?
(a) Duma's
(b) Hoffmann
(c) Victore
(d)Tswett

1 M

1 (a) 5 Duma's method used for the estimation of
(a) Carbon
(b) Nitrogen
(c)Sulphur
(d)Haloge

1 M

1 (a) 6 Beilstein test used for detection of _______
(a) N
(b) Cl
(c) S
(d) C and H

1 M

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 M

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
(d)Sublimation

1 M

1 (b) 2 What is the S.I unit of molarity?
(a) mol^-1
(b) mol
(c) mol.dm^-3
(d) mol.dm^-2

1 M

1 (b) 3 Molarity of 1N HCl solution ______
(a) 1M
(b) 2M
(c) 1M
(d) 0.5M

1 M

1 (b) 4 Normality of 1M H 2 SO 4 solution _______
(a) 2N
(b) 1N
(c) 1.5N
(d) 0.5N

1 M

1 (b) 5 Sooty flame suggested ______
(a) Aromatic compound
(b) CHCI₃
(c) CCI₄
(d) All

1 M

1 (b) 6 Melting point of Benzoic acid ______ °C (a)75
(b) 187
(c) 121
(d) 44

1 M

1 (b) 7 C and H are estimated by
(a) Liebig method
(b)Carius method
(c) Hofmann method
(d) Duma's method

1 M

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 M

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 M

1 (c) 3 Lab fire extinguishers release _______ to extinguish fire (a) O₂
(b) H₂
(C)N₂O
(d) CO₂.

1 M

1 (c) 4 Which of the following compound can be purified by sublimation?
(a) Alcohol
(b) silica
(c) naphthalene
(d) glucose

1 M

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 M

1 (c) 6 Milk of magnesia will show pH _______ in pH meter:
(a)7
(b) greater than 7
(c) lesser than 7
(d) can't say

1 M

1 (c) 7 In partition chromatography, stationary phase is
(a) Liquid
(b) gas
(c) solid
(d) any of these

1 M

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 M

1 (d) 2 The number of coordinate bonds formed by EDTA with metal cation:
(a) 7
(b) 4
(c) 6
(d) 5

1 M

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
(a)	CH₃COOH	NaCI	NH3	NaOH
(b)	NaCI	CH₃COOH	NaOH	NH₃
(c)	NaOH	NH₃	CH₃COOH	NaCI
(d)	NH₃	NaOH	NaCI	CH₃COOH

1 M

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 M

1 (d) 5 Novalak is ______
(a)Phenol formaldehyde resin
(b) polyurethane resin
(c) Urea formaldehyde resin

1 M

1 (d) 6 In an electrochemical cell oxidation always occurs at ________
(a) anode
(b) cathode
(c) salt bridge
(d) electrolyte

1 M

1 (d) 7 Brass is an alloy of ______
(a) Cu & Sn
(b) Cu & Zn
(C) Ag & Pb
(d) Cr & Al

1 M

2 (a) What is green chemistry? Explain it.

3 M

2 (b) Explain problems which arise due to untreated hard water.

4 M

2 (c) Explain soda lime process for water treatment.

7 M

3 (a) Describe cathodic protection.

3 M

3 (b) Explain physical properties of metal.

4 M

3 (c) Discuss dry and wet corrosion.

7 M

4 (a) Explain vulcanization of rubber

3 M

4 (b) Discuss the application of polystyrene, PVC and polyethylene.

4 M

4 (c) What is Portland cement? Describe manufacturing of Portland cement.

7 M

5 (a) Define bio-technology and explain it.

3 M

5 (b) What are insulators? How they classified?

4 M

5 (c) What is fermentation? Explain enzymes and it's application in industries.

7 M

6 (a) Write the principle and use of IR spectroscopy.

3 M

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 M

6 (c) Give the classification, properties and applications of abrasives.

7 M

7 (a) Give the application of UV visible spectroscopy.

3 M

7 (b) Describe the process of melt spinning of fibres.

4 M

7 (c) What is fuel? Classify it, and write a short note on the refining of petroleum.

7 M

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