Karnatak University 2007 Science - Question Paper

(D) Boiler gets corroded when hard water is boiled inside.
Ans :
38. Which of the subsequent substances are formed in the process of saponification ?
(A) Fat and Oil (B) Soap and Sodium hydroxide
(C) Glycerol and Sodium hydroxide (D) Soap and Glycerol.
Ans :
39. Even though the cleansing property of detergent is better than soap, you have to limit
the use of detergents. Why ?
(A) The cost of detergent is more than soap
(B) It effects on the hands of the user
(C) The production is more complicated
(D) It polutes both water and land.
Ans :

PART – B
40. a) Name the force experienced by a current carrying conductor if it is kept in
magnetic field.
b) describe the Fleming's left hand rule. 2
41. Draw a neat sketch of Laser tube. 2

42. a) discuss how the principle of conservation of momentum is involved in rocket
working.
b) What do you mean orbital velocity ? Why is the period of revolution of
geostationary satellite more or less than 24 hours ? 4
43. Write any 2 differences ranging from the Petrol engine and the Diesel engine. 2
44. Draw a neat sketch of petrol engine. ( Internal combustion engine ) 2
45. discuss the Big bang theory which caused expansion of universe. 2
46. Name any 2 radio-isotopes and write 1 use of every isotope. 2
47. Draw a neat sketch of nuclear power plant. 2
48. Balance the subsequent chemical reactions : 2
a) Al + Cl two ? two AlCl 3
b) Fe + AgNO three ? Fe ( NO three ) two + Ag.
49. a) What is isomerism ? Name 2 isomers of butane.
b) What is the meaning of thermal cracking ? Why is petroleum cracking being
done ? 4
50.Suggest any 4 methods of conserving water. 2
51.
GROUP - II
( Biology )
( Marks : 35 )
PART - C
Four options are provided for every of the subsequent ques. / incomplete
statements. Only 1 of them is accurate or most improper. select the most
improper option and write it in the space given beneath every ques..
21 × one = 21
51. Rhizoids are current in
(A) Pteridophyta
(B) Bryophyta
(C) Gymnosperms
(D) Angiosperms.

Earning:   Approval pending.