Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Civil Engineering (CE) 2020 March 1st and 2nd Sem CH 101 Chemistryengineering Chemistry Previous Question Paper
Roll No. Total No. of Pages : 03
Total No. of Questions : 18
B.Tech. (CSE/ECE/CIVIL) (Sem.?2)
CHEMISTRY/ENGINEERING CHEMISTRY
Subject Code : CH-101
M.Code : 54003
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION - B & C. have FOUR questions each.
3. Attempt any FIVE questions from SECTION B & C carrying EIGHT marks each.
4. Select atleast TWO questions from SECTION - B & C.
SECTION-A
Write short notes on :
1) What does Chemical oxygen demand measures?
2) What are the characteristics of a good adsorbent in chromatographic technique?
3) What are buffer solutions?
4) What is Caustic Embrittlement?
5) Explain the principle of NMR spectroscopy
6) Define quantum efficiency.
7) Define phase rule and reduced phase rule.
8) What is overvoltage?
9) Why is oxygen unsuitable as a carrier gas for GLC?
10) Why is chlorine added to water?
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1 | M-54003 (S1)-2736
Roll No. Total No. of Pages : 03
Total No. of Questions : 18
B.Tech. (CSE/ECE/CIVIL) (Sem.?2)
CHEMISTRY/ENGINEERING CHEMISTRY
Subject Code : CH-101
M.Code : 54003
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION - B & C. have FOUR questions each.
3. Attempt any FIVE questions from SECTION B & C carrying EIGHT marks each.
4. Select atleast TWO questions from SECTION - B & C.
SECTION-A
Write short notes on :
1) What does Chemical oxygen demand measures?
2) What are the characteristics of a good adsorbent in chromatographic technique?
3) What are buffer solutions?
4) What is Caustic Embrittlement?
5) Explain the principle of NMR spectroscopy
6) Define quantum efficiency.
7) Define phase rule and reduced phase rule.
8) What is overvoltage?
9) Why is oxygen unsuitable as a carrier gas for GLC?
10) Why is chlorine added to water?
2 | M-54003 (S1)-2736
SECTION-B
11) (a) What is water softening and what are the different methods of water softening? (3)
(b) Why does tap water often smells like Chlorine? (3)
(c) What affects water hardness? (2)
12) (a) Why does impure metal corrodes faster than pure metal? (2)
(b) Iron corrodes faster than aluminium, even though iron is placed below aluminium in
electrochemical series. Why? (2)
13) (a) What is chromatography are the advantages of chromatography over other
techniques? (3)
(b) What are the main differences between High Pressure Liquid Chromatography and
Gas Chromatography? (3)
(c) What type of solvents are generally employed for chromatography? (2)
14) (a) What is the function of salt bridge in electrochemical cell? (2)
(b) Write a short note on reversible and irreversible cell (3)
(c) Calculate the potential of the following electrochemical cell at 25?C : (3)
Cu (s) || Cu
2+
(aq) (0.50M) || H
+
(0.01)|H
2
(0.95 atm); Pt
SECTION-C
15) (a) What is photochemical reaction and where does it occur? (3)
(b) A solution containing bromine and cinnamic acid dissolved in CCl
4
was irradiated
with light of wavelength 4358? for 20 min. The intensity of light was 20,000 erg s
-1
and the solution absorbs only 90% of the light passing through it. If the amount of
bromine consumed in this interval is 6.36?10
?3
mol. What is the quantum yield? (5)
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1 | M-54003 (S1)-2736
Roll No. Total No. of Pages : 03
Total No. of Questions : 18
B.Tech. (CSE/ECE/CIVIL) (Sem.?2)
CHEMISTRY/ENGINEERING CHEMISTRY
Subject Code : CH-101
M.Code : 54003
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION - B & C. have FOUR questions each.
3. Attempt any FIVE questions from SECTION B & C carrying EIGHT marks each.
4. Select atleast TWO questions from SECTION - B & C.
SECTION-A
Write short notes on :
1) What does Chemical oxygen demand measures?
2) What are the characteristics of a good adsorbent in chromatographic technique?
3) What are buffer solutions?
4) What is Caustic Embrittlement?
5) Explain the principle of NMR spectroscopy
6) Define quantum efficiency.
7) Define phase rule and reduced phase rule.
8) What is overvoltage?
9) Why is oxygen unsuitable as a carrier gas for GLC?
10) Why is chlorine added to water?
2 | M-54003 (S1)-2736
SECTION-B
11) (a) What is water softening and what are the different methods of water softening? (3)
(b) Why does tap water often smells like Chlorine? (3)
(c) What affects water hardness? (2)
12) (a) Why does impure metal corrodes faster than pure metal? (2)
(b) Iron corrodes faster than aluminium, even though iron is placed below aluminium in
electrochemical series. Why? (2)
13) (a) What is chromatography are the advantages of chromatography over other
techniques? (3)
(b) What are the main differences between High Pressure Liquid Chromatography and
Gas Chromatography? (3)
(c) What type of solvents are generally employed for chromatography? (2)
14) (a) What is the function of salt bridge in electrochemical cell? (2)
(b) Write a short note on reversible and irreversible cell (3)
(c) Calculate the potential of the following electrochemical cell at 25?C : (3)
Cu (s) || Cu
2+
(aq) (0.50M) || H
+
(0.01)|H
2
(0.95 atm); Pt
SECTION-C
15) (a) What is photochemical reaction and where does it occur? (3)
(b) A solution containing bromine and cinnamic acid dissolved in CCl
4
was irradiated
with light of wavelength 4358? for 20 min. The intensity of light was 20,000 erg s
-1
and the solution absorbs only 90% of the light passing through it. If the amount of
bromine consumed in this interval is 6.36?10
?3
mol. What is the quantum yield? (5)
3 | M-54003 (S1)-2736
16) (a) Explain the Beer-Lambert's law. (4)
(b) Why water cannot be used as a solvent in IR spectroscopy? (2)
(c) What are the basic requirements for the Franck-Condon principle? (2)
17) (a) From the following sets of proton NMR data, give a structure consistent with each of
the following : (4)
a) C
9
H
11
Br (i) Quintet (2.15), 2H (ii) Triplet (2.75), 2H
(iii) Triplet (3.38), 2H (iv) Singlet (7.25), 5H
b) C
10
H
14
(i) Singlet (0.88), 9H (ii) Singlet (7.28), 5H
(b) Write a short note on application of NMR in MRI. (4)
18) (a) Discuss the application of phase rule to Phenol- Water system. (4)
(b) Discuss the following colligative properties :
(i) Elevation in boiling boint
(ii) Relative lowering in vapor pressure (4)
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020