RE-111'AP' SEE 2075 (2019) (Compulsory Science) New Course

RE-111'AP'

SEE 2075 (2019)

(Compulsory Science)

New Course

(Answer all the questions.)

(Group 'A') 15x1=15

1.    Write short answer of the following questions.

a.    What is the value of acceleration due to gravity at the pole of the earth?

b.    What is alternative source of energy?

c.    In which two factors do the heat gain or loss by any object depend upon?

d.    Define converging lens.

e.    What is transformer?

f.     Write the types of given chemical equation.

g.    Define neutral salt.

h.    Name any two ores of iron.

i.     Write general formula of alkene.

j.     Write the name of two species of silkworm cultivated in Nepal.

k.    Write the name of vein in which pure blood flows.

l.     Write any two chromosomal disorders caused by sex chromosome.

m.  What is the part of plant called that is used for root in grafting?

n.    Mention any two effects of water pollution.

o.    In which eras do owl and flowering plants evolved?

(Group 'B') 13x2=26

2.      Kathmandu lies at high altitude than Biratnagar from sea level. Where does an object has more weight between two places? Give reason.

3.      In the context Nepal, hydropower should be given more priority rather than fossil fuel. Why? Justify with two reasons.

4.      What happens if an egg is kept in two beakers containing pure water and     

saturated salt solution? Why?

5.      Mention any two reasons of using nicrome wire in electric heater.

6.      Write any two characteristics of modern periodic table.

7.      Write the balanced chemical reaction between Aluminium metal and dilute hydrochloric acid. Mention the type of reaction with reason.

8.      Write a structural formula of glycerol and write any one use of ethyl alcohol.

9.      Write any two functions of organic fertilizer.Write two differences between axon and dendrites.

10.   Write two differences between systemic and pulmonary blood circulation.

11.   Which process is represented by given chart?

12.   According to that process write down differences between (44, xx) and (44,

xy).

13.  Write any two differences between drone bee and worker bee.

14.  Why is meteor generally finished before reaching the earth surface?

(Group 'C') 6x3=18

15.  What is the condition for an object to sink in water? The cross-sectional area

of piston A1 and A2 is 50cm2 and 0.2m2 respectively.
How much load can lift in piston A2 if 250N force is applied on piston A1.

16.  Prove that heat loss or gain by an object is equal to the product of mass of object, specific heat capacity and change in temperature.

17.  In the given figure, red litmus paper is inserted in solution and colour remains unchanged then what may be contained in vessel among acid, base and salt solution. How can it be further tested to confirm it?

      

18.  Why is glass called fourth state of matter? Write any two uses of water glass and lead crystal glass.

19.   Draw neat and clean diagram of reproductive part of plant and label its four major parts.

20.  What will you suggest to your neighbours so that it can help to reduce soil pollution? Write any six suggestions.

(Group 'D') 4x4=16

21.  Draw a ray diagram of an image formed when an object is placed at a distance of 10 cm from a convex lens having focal length 20 cm. Write any two nature of image. Calculate the power of lens.

22.  Study the given diagram an answer the following questions. 

           I.      Which gas is collected in gas jar?

          II.      Why is the gas jar kept erect?

        III.      What happen when gas is reacted with potassium hydroxide? Write the

    balanced chemical equation.

23.  Draw a chart to show the first generation and second generation resulted due to the fusion of gamets of long-winged housefly (HH) and short winged housefly (hh). Which generation shows the law of purity of gamets? Justify it.

24.  Write the name of main chemical which destroys ozone layer. How is ozone layer is depleted by that chemical? Describe with chemical equation.

The End