Chemistry : Question Paper Jun 2015 - First Year Engineering (Semester 2) | Gujarat Technological University (GTU)
1 Answer

Chemistry - Jun 2015

First Year Engineering (Semester 2)

(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.

Objective Question (MCQ

1 (a) 1 If nitrogen if present in the given sample than in its Lessaigne's solution it will converted in to
(a) Sodium nitrate
(b)Lead Chloride
(c)Sodium cyanide
(d)Lead nitrite.
(1 marks)
1 (a) 2 Oxidation test is usually carried out in .
. (a) Shell Tube
(b)Bomb Tube
(c)Test tube
(d)Hydrogen tube.
(1 marks)
1 (a) 3 Which of the following compound will give green flame during Beilstein Test?
(a) Benzene
(d)All of these.
(1 marks)
1 (a) 4 'Similia Similibus' is the principle of
(a) Crystallization
(1 marks)
1 (a) 5 Which of the following compound will show sublimation
(a) Benzene
(d)All of these.
(1 marks)
1 (a) 6 Identify the sweeter solution of sugar prepared in water.
(a) 1 m sugar solution
(b)1 M sugar solution
(c)0.5 m sugar solution
(d)0.5 M sugar solution.
(1 marks)
1 (a) 7 For Chromatography identify the incorrect statement.
(a) The eluate is a mobile phase leaving the column.
(b)The eluent is the solvent that carries the analyte
(c)The analyte is the stationary phase made by silica.
(d)The solute refers to the sample components in partition chromatography.
(1 marks)
1 (b) 1 Identify the right pair of novalak resin's constituents.
(a) Benzene + Formaldehyde (b) Phenol + Acetal
(c)Phenol + Methanal
(d)Toluene + Formaldehyde.
(1 marks)
1 (b) 2 Chemically fats and oils are
(a) Bases
(b)Strong bases
(1 marks)
1 (b) 3 Identify the wrong pair
(a) Condenser - Distillation
(b)Funnel - Sublimation
(c)Vacuum Flask Filtration (d) All of these.
(1 marks)
1 (b) 4 What piece of laboratory equipment is bet suitable to measure accurate volume of liquid?
(a) Accurate funnel
(b)Graduated cylinder
(c)Erlenmeyer Flask
(d)Conical flask.
(1 marks)
1 (b) 5 Which method is useful for the separation of 1° , 2° and 3° amines?
(a) Hinsberg method
(b)Hoffmann Method
(c)Both a and b
(d)none of these
(1 marks)
1 (b) 6 Which of the following is not so complicated for in process analysis?
(a) GC
(c)TLC (d) GC-MS
(1 marks)
1 (b) 7 Whipped cream is an example of ______type of colloid.
(a) Aerosol (b) Gel (c)Sol
(1 marks)

Answer the following

1 (c) 1 Homogeneous mixture of solute and solvent is known as__________
A) Solution
B) Steam
C) Liquid
D) Gas.
(1 marks)
1 (c) 2 An acidic solution has its pH__________
A) Equal to 7
B) Less than 7
C) More than 7
D) Any one of this.
(1 marks)
1 (c) 3 A sample of water that does not give lather with soap solution is_____________
A) Soft water
B) Hard water
C) Acidic water
D) Alkaline water.
(1 marks)
1 (c) 4 pH+pOH=_____________
A) 10
B) 12
C) 14
D) 16.
(1 marks)
1 (c) 5 A long chain of _______ is called polymer.
A) Isomers
B) Optical isomers
C) Geometrical isomers
D) Monomers.
(1 marks)
1 (c) 6 A substance when heated directly get converted from solid to gaseous state without appearance of liquid state. This phenomenon is known as_______________
A) Sublimation
B) Distillation
C) Crystallization
D) None of these.
(1 marks)
1 (c) 7 __________ is the technique to separate two liquid compounds.
A) Sublimation
B) Distillation
C) Crystallization
D) Polymerization.
(1 marks)
1 (d) 1 A normal solution is that when equivalent weight of a compound is dissolved into __________litre of solution.
A) 10
B) 100
C) 1
D) 1000.
(1 marks)
1 (d) 2 If a solution is having its pH=10.It is a____________ solution
A) Neutral
B) Basic
C) Acidic
D) None of these.
(1 marks)
1 (d) 3 ______________ hardness of water can be removed by just boiling.,br> A) Permanent
B) temporary
C) Both
D) None of these.
(1 marks)
1 (d) 4 polythene is made up of polymerization of ____________ monomers
A) Butane
B) Propene
C) Ethene
D) Methene.
(1 marks)
1 (d) 5 _______________is the technique of separation and identification of chemical compounds.
A) Chromatography
B) bibliography
C) Biography
D) None of these.
(1 marks)
1 (d) 6 HPLC is____________
A) High plastic liquid chromatography chromatography
B) Highly poor liquid
C) High pressure latex chromatography chromatography
D) High pressure liquid.
(1 marks)
1 (d) 7 An acidic solution turns blue litmus paper_____________
A) Red
B) Black
C) Yellow
D) Green.
(1 marks)
2 (a) What is 'Green Chemistry'? Give Lewis representation of Pcl5.(3 marks) 2 (b) Give Importance of organic Molecules.(4 marks) 2 (c) Explain the term 'Brackish water'. Write a note on caustic embrittlements.(7 marks) 3 (a) What is back point chlorination? Write its usefulness.(3 marks) 3 (b) Explain the terms: Sacrificing anode and Corrosion inhibitors(4 marks) 3 (c) Define Alloy. Why we make alloy. Give industrial uses of non-ferrous Alloys.(7 marks) 4 (b) Explain the anionic polymerization with mechanism.(4 marks) 4 (c) What is the composition of Portland Cement? Discuss the manufacturing 07 process of Portland cement.(7 marks) 4(a) Explain the terms: PCC and RCC.(3 marks) 5 (a) Give difference between natural and synthetic rubber.(3 marks) 5 (b) Write four different industrial applications of enzymes.(4 marks) 5 (c) What is proximate and ultimate analysis of coal? Write Characteristics of good fuel.(7 marks) 6 (a) Define the terms: Specific gravity, Conductivity and Turbidity.(3 marks) 6 (b) Write a short note on standards of cements.(4 marks) 7 (a) What are glass fibers? Write Uses of glass fibers.(3 marks) 7 (b) Explain any four types of bonds with one example of each.(4 marks) 7 (c) Write classification, properties and uses of Insulators.(7 marks)

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