B. Tech. (Semester - 1st & 2nd) CHEMISTRY (CHM 101)
-
Time: 03 Hours
Maximum Marks: 60
Instruction to Candidates: 1) 2)
Section - A is compulsory.
3)
Select at least Two questions from Section - B & C.
.
Attempt any Five questions from Section - B & C.
Section - A
.
[Marks: 2 Each]
Ql) a) What is the significance of break-point chlorination? b) Why is methanol a good solvent for UV but not for IR determination? c) Pyridine and ammonia are bases while they do not contain any hydroxyl ion. Explain. d) Define the terms: Photosensitization and quenching. e) Distinguish between EMF and electrode potential. f)
Why does magnesium bicarbonate require double amount of lime for softening? ,
g) How many signals are observed in the NMR spectrum of chlorobenzene, acetaldehyde, ethanol and benzene? h) Write the cell reaction for the cell: Na(s)1 NaOH(aq)
i)
j)
.
I IHz (g)J Pt
Why qoes corrosion occur in steel pipe connected to copper plumbing?
What are degrees of freedom? How many degrees of freedom are present in the system when a gas is in equilibrium with its solution in a liquid?
Section Q2)
-
B
[Marks: 8 Each]
(a) Describe the hot lime-soda process for the softening of water. Mention its advantages over cold iime-soda process. -------.. (b) What is desalination? What are the methods available for desalination? Discuss anyone process in details.
Q3)
(a) Describe the mechanjsm of electrochemical corrosion by (i) hydrogen evolution (ii) oxygen absorption. .
(b) What is Pillilfg-Bedworth ratio? How is it related to the protectiveness of an oxide layer? (c) Give a brief account of cathodic protection method for preventing corrOSIon. Q4)
(a) Account for the following:
(i)
Ammonium chloride is used before precipitating group III cations in inorganic analysis.
(ii) An aqueous solution of sodium acetate is.basic. (b) At 298 K, calculate the pH of a 0.23 M weak monobasic acid having ionization constant 7.3 X 10-6. Q5)
(a) Calculate the emf of the cell: ,Zn(s)1 Zn2+ (0.2M)
II.Ag + (0.002M)
I Ag(s)
at 2SoC. Write down the cell reaction. The standard emf of the cell is l.S4V. (b) Describe the construction of Ni-Cd battery with relevant reactions occurring during the discharge: Mention its application.
Section - C Q6)
~
[Marks: 8 Each]
(a) State and explain Einstein law of photochemical equivalence. What is meant by quantum yield of a photochemical reaction? (b) For the photochemical formation of ethylene from d~-n-propyl ketone . using a radiation of wavelength 313 nm the quantum yield is 0.2l. Calculate the number of moles of ethylene formed when the sample is irradiated with SOwatt of this radiation assuming that all the radiation is absorbed by the sample.
,127) ~.'
(a) Define the following: (i) Eutectic point (ii) Triple point (b) State and derive Phase rule. What is reduced phase rule? Draw and explain phase diagram of KI-H20 system.
Q8)
(a) Three isomeric ethers are possible with the molecular formula C4HlOO. State how many signals will arise in the CarbOli-I3 NMR spectrum of each. Give explanation to your answer. .
(b) Explain the application of NMR spectroscopy to the following: (i)
Hydrogen bonding.
(ii) Structural diagnosis of keto-enol tautomers. Q9)
(a) Justify the following statements: (i)
Absorption bands are formed in ultra-violet spectrum instead of sharp peaks.
(ii) Increasing the polarity of the solvent shifts 1[-71[* band tb longer wavelength but n -7 1[* to shorter wavelengths. (iii) Wavelength as well as extinction-coefficient increase in conjugation in the compound.
increases with the
(b) Define Frank-Condon principle and' give its importance in molecular spectroscopy.
(b) What is desalination? What are the methods available for desalination? ... Q3) (a) Describe the mechanjsm of electrochemical corrosion by (i) hydrogen.
Q4) Solve the system of equations. (2D - 4)Yl + (3D + ... Q9) Annual rain~all at a certain place is normally distributed with mean 45 cm. The rainfall for the last five ...
Define chromophore and explainwith examples. Section - B. (Marks: 8 Each) ... Displaying GNDEC B.Tech CHM 1st Year May 2008 Chemistry.pdf. Page 1 of 2.
Q7) (a) What is the function of support roll in rolling mill. ... effect of support roll on the torque. ... Displaying GNDEC M.Tech PE Dec 2007 Metal Forming.pdf.
Paper ID [MBI02]. (Please fill this Paper ID in OMR Sheet). MBA (Sem. -1St).. ORGANISATIONAL BEHAVIOUR (MB -102). Time: 03 Hours- Instruction to Candidates: 1\1aximum Marks: 60. 1) ... What are the features of learning organization? ... Displaying GN
B~Tech., (Sem. - 1st I 2nd) ... take tetra ethyl silane as a standard? Q8) (a) How is the ... Displaying GNDEC B.Tech ME 1st Year 2009 Chemistry.pdf. Page 1 of 2.
Page 1 of 60. r . Roll Xo. ...................... z- t?Total Xo. of Questions : 08] [Total Xo. of Pages.: 01. Paper ID [PE504). (Please fill this Paper ID in OMR Sheet). M.Tech. . WELDING TECHNOLOGY (PE - 504). Time: 03 Hours. Instruction to Candidat
There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. Main menu.
Where do we use ASCII, Excess-3 & Grey codes? ... (ii) Express f in standard SOP form. . , ... GNDEC B.Tech ECE Sem 4 Dec 2007 Digital Electronics.pdf.
COMMUNICATION SERVICES: MESSENGERIAL (DHL) US Japan Middle East France. - Package. > Junior Box ..... Whoops! There was a problem loading this page. Retrying... GNDEC MBA 2nd Year Dec 2009 Social Security & Labour Welfare.pdf. GNDEC MBA 2nd Year Dec
SOFTWARE ENGINEERING METHODOLOGIES. SUBJECT CODE :CS -514 (Elective - II) ... between incremental development and rapid application development. method. Q2) Define the terms: ... Page 2 of 2. Main menu. Displaying GNDEC M.Tech CS Dec 2009 Software En
j) Write the important features of FDDI Technology. J-534 (8129) P.T.o. ... Q6) Discuss the different types of Licensing policies which can be used while ... Displaying GNDEC B.Tech IT Sem 6 Dec 2009 Network Operating System.pdf. Page 1 of ...
Q7) What is meant by the terms 'Flexibility', 'Proportionality', 's~tting' and. 'sensitivity' as applied to modules. Derive equation's for them and discuss. relation between these terms. Q8) Explain how will you determinethe following in design of a
There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. Main menu.
... below to open or edit this item. MBBS 1st Year Retotaling Result.pdf. MBBS 1st Year Retotaling Result.pdf. Open. Extract. Open with. Sign In. Main menu.
Page 1 of 60. Bohol Profile. Bohol. Basic Facts. Geographic Location Bohol is nestled securely at the heart of the Central. Visayas Region, between southeast of Cebu and southwest. of Leyte. Located centrally in the Philippine Archipelago, specifical
Whoops! There was a problem loading more pages. Retrying... Whoops! There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. 1st Year Chemistry 2.pdf. 1st Year Chemi
Q5) Explain cognitive dissonance theory. How can marketers reduce dissonance. experienced by consumer? Q6) Discuss the profile of consumer innovator. Q7) "Define culture. Explain the affect of culture and subculture on consumer. behaviour. Give suita
(Judges 7:10-15). a. Gideon heard them talking about a dream. in which a loaf of barley bread knocked down. their tent, and they interpreted it as the sword of. Gideon. 2. God loves to increase the odds against us winning. a victory naturally, which
http://www.dcs.kcl.ac.uk/staff/odinaldo/research/phd_thesis.pdf. Riana, Joselyto and Renata Wassermann 2004. âUsing relevance to speed up inference: some ...