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Posted By: preet Member Level: Gold Posted Date: 13 Sep 2008
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2007 University of Rajasthan B.Sc INORGANIC CHEMISTRY (FIRST PAPER) University Question paper
B.SC (PART II) EXAMINATION , 2007
(FACULTY OF SCIENCE)
[ALSO COMMON WITH SUBSIDIARY PAPER OF B.SC.(HONS.)PART II]
(THRE YEAR SCHEME OF 10+2+3 PATTERN)
CHEMISTRY (FIRST PAPER)
(INORGANIC CHEMISTRY )
TIME ALLOWED: THREE HOURS MAXIMUM MARKS- 33
ATTEMPT FIVE QUESTION IN ALL . SELECT ATLEAST ONE QUESTION FROM EACH SECTION
(SECTION - A )
1. WHY DO TRANSITION ELEMENTS EXHIBIT VARIABLE OXIDATION STATE ? EXPLAIN GIVING
VARIOUS OXIDATION STATES EXHIBITED BY FIRST ROW TRANSITION ELEMENTS.
(MARKS - 6.5)
2. EXPLAIN THE FOLLOWING :-
(I) COLOUR OF TRANSITION METAL COMPOUNDS .
(II) MELTING POINT OF CHROMIUM IS THE HIGHEST AMONG THE 3d METALS .
(III) CrO IS BASIC , Cr2O3 AMPHOTERIC AND CrO3 IS ACIDIC.
(MARKS -2+2+2.5)
( SECTION -B )
3. GIVE THE IUPAC NAMES , THE OXIDATION NUMBER OF THE CENTRAL METALS
ATOMS AND THE NUMBER OF UNPAIRED ELECTRONS IN THE FOLLOWING -
(I) [Cr(NH3)4CL2] (II) Na3[Co(NO2)6] (III) [Ni(CO)4].
(MARKS -2+2+2.5)
4. DISCUSS THE VALENCE BOND THEORY FOR COMPLEX COMPOUNDS. HOW
DOES THIS THEORY EXPLAIN THE GEOMETRY AND MAGNETIC PROPERTIES
OF THESE COMPOUNDS ? WHAT ARE THE LIMITATIONS OF THIS THEORY ?
(MARKS -6.5)
( SECTION -C )
5. (a) WHAT ARE LANTHANIDES ? WHY WERE THEY NAMES AS 'RARE EARTHS' ?
(b) ON THE BASIS OF ELECTRONIC CONFIGURATION OF LANTHANIDES EXPLAIN
THE ANOMALOUS OXIDATION STATES EXHIBITED BY SOME OF THEM.
(MARKS - 3+3.5)
6. DISCUSS THE OXIDATION STATES AND THE ELECTRONIC CONFIGURATION OF
ACTINIDES. (MARKS - 6.5)
(SECTION -D )
7. WHAT IS REDOX POTENTIAL ? ON THE BASIS OF REDOX POTENTIAL COMPARE THE
RELATIVE STRENGTH OF OXIDISING AND REDUCING AGENTS.
(MARKS - 6.5)
8. WRITE A NOTE ON REDOX SYSTEM IN WATER .
(MARKS -6.5)
( SECTION - E )
9. WHAT IS LEWIS ACID-BASE CONCEPT ? GIVE CLASSIFICATION OF ACIDS AND BASES
ACCORDING TO LEWIS THEORY .
(MARKS -7)
10. WHAT IS MEANT BY NON-AQUEOUS SOLVENTS ? DESCRIBE IMPORTANT TYPES OF
REACTIONS TAKING PLACE IN LIQUID AMMONIA AS A SOLVENT .
(MARKS - 7
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