Mitra High School
Kalimati-Kuleshowr
2073 Test Examination
Subject: Science
|
Class
10
|
F.M. 75
|
|
Time:
3hours
|
P.M. 24
|
Attem all questions
GROUP
'A': PHYSICS
1.
(a) Define the physical Quantity that have value 6.67x10-11Nm2kg-2.
Prove that Newton's
Universal Law of Gravitation. A object of mass 50kg is placed on the distance
of 6400km from the center of earth find the weight of object when it is
placed on the 9900km from the earth center.1+2+1.5=4)
(b) Define nuclear fission and nuclear fusion reaction
with an example. "We might face energy crisis in near
future" Justify the statement. (1.5+2=3.5)
2.
(a) Prove that U=vdg. Symbols have usual
meanings. A pieces of any matter of volume 0.4m3 and density 800kgm-3
is kept in water then what part of it will be inside water? (2+2=4)
(b) On the basis of which principles the
hydraulic machine constructed. Write this principle. It is easier to lift a
heavy stone inside the water than air, why? (0.5+1+2=3.5)
3. (a) In which two factors does heat energy
depends? In very cold region water pipes burst in winter, why? When 50 gm of water
at 70oc is mixed with 30 gram of water at 15oc then find
the resultant temperature. (1+1+2.5=4.5)
(b) What is
long-sightedness? What is the power of lens, if its focal length is 400 mm? (1+1+1=3)
4.
(a) Write down the difference between fluorescent
lamp and filament lamp? A primary winding of a transformer is 1000 turns and it
is connected with 6A, 220V. The output is 110V. Calculate the number of the
turns in secondary coil and electrical energy consumed by primary coil 20 hours
if rate is rs.5 (2+2=4.5)
(b) What do you
mean by electroplating? What is heating element? Which coil is used in filament
lamp, why? (1+1+1=3)
GROUP 'B': CHEMISTRY
5. (a)
Which one is more reactive Ca and Mg,
and why? Find out the gram molecular weight of limestone. Why Na is called
metal? (1+1+1+1=4)
(b) Which gas
is produced when lime stone is treated with dilute hydrochloric acid, explain
its laboratory preparation. Write the reaction when it is reacts with ammonia
gas. (1+2+0.5=3.5)
6.
(a) Why
aluminium is not affected by air and water? What is universal indicator? Why
HCL is called acid? Give an example of weak acid. (1+1+1+0.5=3.5)
(b) Write any tow differences between Bakelite and
Poly vinyl chloride. Mention two negative effects of excessive use of chemical
fertilizer and insecticides in our daily life.
(1.5+1+1=3.5)
GROUP 'C': BIOLOGY
7.
(a)
Define taxis? write any two symptoms in each seen due to less and excess
production of hormones from thyroid gland. The wall of left ventricle is
thicker than the wall of right ventricle, why? (1+2+1.5=4.5)
(b) What is
human immune system? The disease T.B. will not be cured in a person with
HIV/AIDS, why? Write the function of Fibrinogen. (1+1+1=3)
8. (a)
What is synopsis? What is the reason for
not doubling the number of chromosome in each generation in sexually
reproducing organisms? Clarify the reason write two difference between mitosis
and meiosis cell division.
(1+1.5+2=4.5)
(b) Name the two parts of Archegonium. What type of
reproduction occurs in mushroom, why? Write any one difference between male
gamete and female gamete. (1+1.5+1=3.5)
9. (a) Name four sub phylums of phylum chordata.
What is the scientific name of fron? Rainfall with thunder in Chaitra- Baisakh
is considered as good for farming in hilly region of Nepal, why? (2+0.5+1.5=4)
(b) What is sex
linked disease? Write one example of sex linked disease. Show the result of
first and second generation of yellow colored (YY) Round seeded(RR) and Green
colored (yy) wrinkled seeded (rr) pea plants, When they are pollinated. (1+0.5+2=3.5)
GROUP 'B': GEOLOGY
AND ASTRONOMY 11
10. (a)
Scientists
have said that human beings and the earth did not come into existence at the
same time, why? How is fossil formed?
What is the importance of ozone layer? (1+1.5+1=3.5)
(b) Write any two differences
between meteor and comet. Name one spiral galaxy. How is red giant star
formed? (2+0.5+1.5=4)
Best of Luck
0 Comments
If you have any doubt please text me