University of Rajasthan 2007 B.Sc Chemistry INORGANIC (FIRST ) - Question Paper

B.SC (PART II) exam , 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: 3 HOURS MAXIMUM MARKS- 33

ATTEMPT 5 ques. IN ALL . choose ATLEAST 1 ques. FROM every part



(SECTION - A )

1. WHY DO TRANSITION ELEMENTS EXHIBIT VARIABLE OXIDATION STATE ? discuss GIVING
different OXIDATION STATES EXHIBITED BY 1st ROW TRANSITION ELEMENTS.
(MARKS - 6.5)

2. discuss THE subsequent :-
(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)


( part -B )

3. provide THE IUPAC NAMES , THE OXIDATION NUMBER OF THE CENTRAL METALS
ATOMS AND THE NUMBER OF UNPAIRED ELECTRONS IN THE subsequent -

(I) [Cr(NH3)4CL2] (II) Na3[Co(NO2)6] (III) [Ni(CO)4].
(MARKS -2+2+2.5)

4. explain THE VALENCE BOND THEORY FOR COMPLEX COMPOUNDS. HOW
DOES THIS THEORY discuss THE GEOMETRY AND MAGNETIC PROPERTIES
OF THESE COMPOUNDS ? elaborate THE LIMITATIONS OF THIS THEORY ?
(MARKS -6.5)


( part -C )

5. (a) elaborate LANTHANIDES ? WHY WERE THEY NAMES AS 'RARE EARTHS' ?

(b) ON THE BASIS OF ELECTRONIC CONFIGURATION OF LANTHANIDES discuss
THE ANOMALOUS OXIDATION STATES EXHIBITED BY a few OF THEM.
(MARKS - 3+3.5)

6. explain 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)



( part - E )

9. WHAT IS LEWIS ACID-BASE CONCEPT ? provide CLASSIFICATION OF ACIDS AND BASES
ACCORDING TO LEWIS THEORY .
(MARKS -7)

10. WHAT IS MEANT BY NON-AQUEOUS SOLVENTS ? define IMPORTANT kinds OF
REACTIONS TAKING PLACE IN LIQUID AMMONIA AS A SOLVENT .
(MARKS - 7

Earning:   Approval pending.