SEE Science and technology

 

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.

 Section B

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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