SEE 2082 Bagmati Province — Science Past Paper

Full marks: 75 · Time: 180 · With step-by-step model answers in Nepali & English.

1. Q1.

   Choose the best alternative of the following questions and write the answer in the answer-sheet.

   • (a) The result of a person's blood test shows more amount of sugar in his blood. Which of the following physical symptoms may have the person experienced? (i) Joint pain (ii) Deep pain in muscles (iii) Excessive hunger and thirst (iv) Heart attack
   • (b) Which of the following is a group of medicinal herbs found in Nepal? (i) Neem, Holy basil, Corn (ii) Caterpillar fungus, Aloevera, Millet (iii) Holy basil, Caterpillar fungus, Paddy (iv) Malabar nut, Calamus, Caterpillar fungus
   • (c) Which one of the following is a cause of climate change? (i) Burning of fossil fuels (ii) Afforestation (iii) Noise pollution (iv) Use of organic fertilizer
   • (d) What will be the weight of a stone on the surface of the Earth if it weighs 78.4 N on the surface of the Moon? (i) 380 N (ii) 490 N (iii) 590 N (iv) 690 N
   • (e) On which principle is the given instrument based? (i) Archimedes' principle (ii) Pascal's law (iii) Law of gravitation (iv) Snell's law (Refer to the diagram in the original question paper.)
   • (f) What type of energy transformation is done by the given instrument? (i) Chemical to electrical energy (ii) Electrical to light energy (iii) Magnetic to electrical energy (iv) Electrical to magnetic energy (Refer to the diagram in the original question paper.)
   • (g) Which of the following electronic configurations is that of the element with valency 2? (i) 1s2, 2s2 2p2 (ii) 1s2, 2s2 2p6, 3s2 (iii) 1s2, 2s2 2p6, 3s2 3p2 (iv) 1s2, 2s2 2p6, 3s2 3p6
   • (h) Which of the following sequences represents the correct order of increase in chemical reactivity of metals? (i) Be < Mg < Ca (ii) Na < Li < K (iii) Mg < Al < Si (iv) Li < K < Na
   • (i) Three beakers labelled A, B and C each contain 25 ml of water. A small amount of NaOH, anhydrous CuSO4 and NaCl is added to beakers A, B and C respectively. The temperature rises in A and B but falls in C. Which statement is correct? (i) In beakers A and B exothermic and in C endothermic reaction has occurred. (ii) In beakers A and B endothermic and in C exothermic reaction has occurred. (iii) In beakers A, B and C exothermic reaction has occurred. (iv) Concept of heat cannot be developed by this information.
   • (j) Which ore is converted into a metallic oxide by the calcination method? (i) Bauxite (ii) Siderite (iii) Cuprite (iv) Hematite
2. Q2.

   Write very short answers to the following questions.

   • (a) What is the dependent variable in the process of making a solution by dissolving a solute in a solvent?
   • (b) Draw a labelled graph to show a digital signal.
   • (c) Lack of which component of blood causes anaemia?
   • (d) Give any one reason for the declining number of animals like tiger, rhino and red panda in Nepal in recent years.
   • (e) What is the weight of the given object in water?
   • (f) While walking on a coal-tarred road on a sunny day, a pool of water appears ahead. Which property of light is responsible for this?
   • (g) Why are the elements of group 1 of the periodic table called alkali metals?
   • (h) How does the metallic property vary along a period in the modern periodic table?
   • (i) Write the roasting process on the basis of purification of impure metal.
3. Q3.

   Check the correctness of the equation v² = u² + 2as² by unit-wise analysis.

4. Q4.

   Write any two advantages that students can take for their studies from digital technology.

5. Q5.

   Write the steps to make a video shorter by cutting (trimming) a longer video.

6. Q6.

   Octopus cannot be kept under phylum Echinodermata even though it is a marine animal. Give any two reasons.

7. Q7.

   Why are Pteridophytes considered to be more developed than Bryophytes? Give any two reasons.

8. Q8.

   Bee farming (apiculture) is beneficial for farmers. Clarify with any two points.

9. Q9.

   Draw a sex-determination chart of the offspring produced by a mother with chromosomes (44 + XX) and a father with chromosomes (44 + XY).

10. Q10.

    Write the differences between DNA and RNA on the basis of function and structure.

11. Q11.

    Calculate the force of gravitation between the heavenly bodies P and Q on the basis of the information given in the figure (P = 1200 kg, Q = 4000 kg, distance = 4000 km). (Refer to the diagram in the original question paper.)

12. Q12.

    Write any two differences between free fall and weightlessness.

13. Q13.

    Draw a well-labelled diagram of the dispersion of light in a prism.

14. Q14.

    Study the graph related to the future of the universe.

    • (a) According to line Z, how will the universe end?
    • (b) According to which line does the universe remain constant (steady)?
15. Q15.

    Write the balanced chemical equation of the reaction between aluminium and dilute sulphuric acid.

16. Q16.

    Write any two differences between soap and detergent on the basis of presence of chemicals and efficiency.

17. Q17.

    Explain the IVF (in-vitro fertilization) process with a suitable figure. Write any two differences between inbreeding and line breeding.

18. Q18.

    The report of the blood test of a person is shown in the chart below:

    • (a) What could be the problem in him?
    • (b) Write the name of blood cell 'B'.
    • (c) Which disease may occur if the number of blood cell 'C' is too low?
    • (d) If he has a cut on his finger and bleeding does not stop, which one among A, B and C may be lesser than normal?
19. Q19.

    Study the given graph.

    • (a) How is the property of water shown in the graph different from other liquids?
    • (b) Write any one advantage of such expansion of water.
    • (c) Draw a model graph showing the relationship between the volume of water and temperature on the basis of the above graph.
    • (d) Why cannot water be used as a thermometric liquid?
20. Q20.

    Study the given diagram of the eye and answer the questions.

    • (a) Identify the type of defect of vision shown in the figure.
    • (b) Write any one cause of this defect.
    • (c) Draw a well-labelled ray diagram showing a corrective measure of this defect.
    • (d) If the image is formed at part A, spectacles of which lens would the person have to use?
21. Q21.

    A microwave oven has the marking 'Number of secondary windings : Number of primary windings = 10 : 1'.

    • (a) If the microwave oven is connected to a 220 V source, calculate the secondary voltage obtained from the transformer.
    • (b) Which type of transformer is this? Draw the model figure of such a transformer. (Refer to the diagram in the original question paper.)
22. Q22.

    Questions based on the laboratory preparation of the gas formed by the reaction between calcium carbonate and dilute hydrochloric acid. (Refer to the diagram in the original question paper.)

    • (a) Draw a well-labelled diagram of the laboratory preparation of the gas formed by the reaction between calcium carbonate and dilute hydrochloric acid.
    • (b) What happens when the gas produced in the above process is passed into lime water for a long time? Write the chemical equation.
    • (c) Write one importance of this gas to plants.
23. Q23.
    • (a) What is meant by a homologous series of hydrocarbons?
    • (b) An example of homologous series of hydrocarbon is given in the table alongside: (i) Write the IUPAC name of the compound 'B'. (ii) Write the structural formula of the compound formed when one hydrogen atom of compound 'A' is displaced by '-OH'. (iii) Write the general molecular formula of the compound formed when one hydrogen atom is removed from each of the two middle carbon atoms of compound 'C'.

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