SEE practice exam 2080
Class: - Ten F.M. – 75
Subject: - Comp. Science Time: - 3:00Hrs
Section A ( Multiple Choice Questions)
1.
Circle
the correct alternatives. (10×1=10)
a)
Which of
the following is derived unit?
i. Kelvin ii.
Mole
iii. Hertz iv.
Candela
b)
Which of
the following of plants need both land and water to complete their life
cycle?
i. Tracheophyta ii.
Bryophyta
iii. Pteridophyta iv. Thallophyta
c)
Experiment
of different shape of pod of pea plant showed the given result. Choose the incorrect
correct statement:
i. B is F1 and C is F2
generation
ii. All the peas at B are hybrids
iii. B represents First law and C represents second
law of Mendel.
iv. B represents purity of gamets because all are
same and pure.
d)
Which part
of Bojo is used as a medicine.?
i. root ii.
rhizome
iii. root iv.
leaf
e)
Hydrometer
is based upon :
i. Newton's
Law ii. Archimedes
principle
iii. Law
of floatation iv.
Charles law
f)
An object
is placed at the centre of curvature of a convex lens. It's image
i. will be formed at focus
ii. will be magnified twice.
iii. appear of same size.
iv. will be virtual.
g)
Under what
condition can open universe be hypothesized?
i. When
average density is greater than critical density
ii. When
average density is less than critical density
iii. When
average density and critical density are equal
iv. When
average density and critical density are not comparable
h)
Which of
the following is not a alkaline metal?
i. B ii. Be
iii. Mg iv. Ca
i)
What type
of reaction is the reaction between sodium chloride and silver nitrate?
i.
combination reaction
ii. Single
displacement reaction
iii.
Double displacement reaction
iv.
decomposition reaction.
j)
Which of
the following statement is correct?
i. Forth
floatation is done for lighter impurities.
ii. Gravity
separation is done if ore and impurities have same density.
iii. Distillation
is done for heavy metals.
iv. Roasting
is done in ores having no oxygen.
2.
Very
short answer type questions. (9×1=9)
a)
Write one advantage of digital
transmission?
b)
What is the common key feature of
plant fern, pine and orange?
c)
What is nuptial flight?
d)
State the structure of DNA in one
sentence.
e)
Name any one protected species of
reptiles in Nepal.
f)
What can you conclude after
performing coin and feather experiment?
g)
You are cooling a hot water. Which
portion of the given graph shows anomalous expansion?
h)
What happens to the reactivity of
elements while moving from left to right in a period of modern periodic table?
i)
Write the chief ore of aluminium and copper.
Section
C
Short
Answer type Questions (14 X 2 =28)
3. Yogesh wants to study about the effect of body exercise
and amount of nutrients in the loss of body weight at he same time. What are
the drawbacks of research topic? How can this study be corrected?
4. Identify the following organism and write one more
character of each:
a. having pneumatic bones, glorified form of
reptiles
b. Having external ears
5.
The figure below shows the diagram for a local
technology used in rural area for
farming insects. Mention the significance of this in the rural economy.
6. "There is no any role of
mother for the determination whether a child is a male or female". Justify
the statement with necessary diagram.
7. While performing a test to
identify the blood group of a person following result is obtained. Identify
his/her blood group. Redraw the diagram if the person lacks all the antigens A,
B and D.
8. Establishment of National Park is
mainly for the conservation of Wildlife. Wildlife frequently destroys
agricultural fields and even takes lives of people and domesticated animals.
Discuss any two cause of conservation of wildlife despite of these disasters.
9. In a hydraulic lift , the cross
section areas of large and small pistons are 5 m2 and 0.25 m2
respectively. Calculate the force required to lift up a car of mass 1200 kg.
10. There is no significant
difference in temperature of day and night in costal area. Justify the
statement.
11. A person of 45 years has
blurred vision due the deposition of a layer of protein on the eye lens.
Explain in short how this is treated by eye surgery.
12. Explain Right hand thumb rule
with figure.
13. Explain Hubble's law in short with diagram.
14. Write the electronic configuration of sulphur in sub-shells and determine its period and group.
15. A students burns a magnesium
ribbon in the class. The ribbon burns producing white ash. Write the balanced
chemical reaction and name the white ash.
16. Lime water can be used to test
carbondioxide gas. Explain in short with chemical reaction.
Secion D (Long Question Answer)(7×4=28)
17. Digital
well-being is the extent to which we can do these things in our digital lives.
So digital well-being may be defined as having the ability to handle online
stress, engage in healthy digital behaviors, and use our technologies in ways
that help us thrive. This can be monitored by using Digital Wellbeing Feature
on Mobile application.
i. Why
should the parents get knowledge about the information explained in the
paragraph ? (2)
ii. What
is the importance of digital well beings for students (2).
18. ….It
is the technique in which semen with living sperms is collected from the male
and introduced into female reproductive tract at proper time with the help of instruments.
This has been found to result in a normal offspring. In this process, the semen
is inseminated into the female by placing a portion of it either in a collected
or diluted form into the cervix or uterus by mechanical methods at the proper
time and under most hygienic conditions.
a. What is the name of the technique? (1)
b. Now a days this technique is
preferred than the natural process for the
reproduction of cattle. Why? (2)
c. It may also save some disadvantage.
Mention if any. (1)
19. The figure shows a treatment to a
serious cardiac disorder the following questions:
a. What had happen to the
patient? 1
b. What is being done? Explain. 2
c. Write any two causes for this
disorder. 1
20. a. Study the table and fill in the
box (2)
|
Pair of places |
value
of 'g' is more at: |
Value
of 'g' is less at: |
Reason |
|
Equilateral/ polar region |
polar region |
equilateral region |
Radius of earth is more at equator
and less at poles |
|
Base and top of Mountain |
(a)………….. |
(b)………… |
(c)………. |
b. A
cricket ball thrown vertically upward into the sky reaches a height of 30 m.
Calculate the velocity with which it is thrown and time taken to reach the
maximum height. (2)
21. a. A person sees a fish in the river
water. What knowledge should he know to kill the fish using a sphere? [2]
b. A microscope can focus object
kept at a fixed place only, but human eye can see both distant and nearby
object. How is it possible? Explain. [2]
22. Study the given figure and answer
the following questions:
a. Which type of transformer is it?
Why? (1)
b. If 400 turns produces secondary
voltage, calculate the number of turn in primary coil. [2]
c. Why is iron core not a single
core but a collection of thin laminated
sheets? [1]
23. Figure below shows the preparation of Ammonia
gas in laboratory. Answer the following questions:
i. Name X and Y. [1]
ii. Why is a substance 'A' used in
the experiment? [1]
iii. How can you test whether the
gas is ammonia or not? [1]
iv. Write two uses of this gas [1]
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