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chemistry
Posted Date: 27 Mar 2008 Resource Type: Articles/Knowledge Sharing Category: Education
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Posted By: karthic Member Level: Silver
Rating:  Points: 4
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MODEL QUESTION PAPER
PART - III
CHEMISTRY, PAPER - I
(English version)
Time: 3 hours Max. Marks: 60
Instructions to candidate :
1) Answer all questions of Section ‘A’. Answer any six questions in Section
‘B’ and any two questions in Section ‘C’.
2). In Section ‘A’, questions from Sr. Nos. 1 to 10 are of “Very short answer
type”. Each question carries two marks. Every answer may be limited
to 2 or 3 sentences. Answer all these questions at one place in the
same order.
3) In Section ‘B’, questions from Sr. Nos. 11 to 18 are of “Short Answer
type”. Each question carries four marks. Every answer may be limited
to 75 words.
4) In Section ‘C’, questions from Sr. Nos. 19 to 21 are of “Long answer
type”. Each question carries eight marks. Every answer may be limited
to 300 words.
5) Draw labelled diagrams wherever necessary for questions in Sections
B and C.
SECTION - A
Note : Answer "all" the questions 10 x 2 = 20 Marks
1) Calculate the wavelength of a particle having 10 mg. of mass and
4 x105 Cm/Sec. Velocity?
2) Calculate the Oxidation number of sulphur in H2SO4 and H2S208.
3) In Xe O3, ‘Xe’ shows Sp3 hybridisation but the shape is Pyramidal.
Give the reason?
4) Why Na+ is having more IP than Na.
5) The molecular weight of a unknown hydrocarbon gas is equal to the
mass of 11.2 lit of O2 at STP. Name the hydrocarbon.
6) What is the Co-ordination number of ionic crystal with limiting radius
ratio of O.732 to 0.999.
7) What is hyperol? Give its formula.
8) What is ammonal and give its use?
9) Write any two effects of depletion of ozone layer.
10) Name two gases which are responsible for global warning.
53
SECTION - B
NOTE: Attempt any “Six” questions 6 x 4 = 24 Marks
11) Define RMS Velocity? If the RMS Velocity of CO2 gas is 4.4 x 104 Cm/Sec. At a given
tempereture, find the RMS Velocity of Ethane
12) Explain Boyle’s and Charle’s Lawas basing on the postulates of kinetic
molecular theory of gases.
13) How Hydrogen peroxide renovates the old spoiled oil paintings Explain
it with relevent reaction.
14) Explain the stages with equations that are involved in the production
of an hydrous magnesium chloride from carnallite.
15) What is allotrophy? Explain the Structure of anyone of the Crystalline
forms of Carbon.
16) Balance the following ionic equation (redox reaction) in basic medium
by ion-election method. ‘
Cr (OH)3 + IO33 I + CrO4
2-
17) Write the corresponding equations for the following reactions and name
the products.
C2H2 A B
18) Explain with example positional and functional isomerisms.
SECTION - C
Note : Attempt “any two” questions 2 x 8 = 16 Marks
19) State the Principles involved in writing the electronic configuration of
atoms Explain them with example and necessary diagrame.
20) Explain the classification of elements into S, P, d, f blocks present in
the periodic table.
21) Define hybridisation of atomic orbitals? Explain the Sp3 and Sp2
hybridisations with respect to ethane and ethylene molecules?
Y
H2/N:
1200C
Br2/CCL4
u
54
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