Set-1

Group ‘A’

1. Write short answers to the following questions

1. What is the value of G on the surface of the moon?
2. What is the value of normal atmospheric pressure?
3. Write the percentages of hydrogen and helium in the sub.
4. What is thermometric liquid?
5. Write a formula for magnification.
6. What is a periodic table?
7. Nitrogen+oxygen $\longrightarrow$nitric oxide+heat. Name the type of given reaction.
8. What do you mean by hydrated salt?
9. What is carbogen?
10. At what age does the royal gland of workers degenerate?
11. Which increases the surface areas of the cerebrum?
12. What is a ganglion?
13. What is a sphygmomanometer?
14. Write the name of two plants that reproduce by binary fission.
15. Write two major events occurring in the palaeozoic era.
    
    

Group’B’

2. How does the gravitational force of attraction between two objects having fixed mass vary if the distance between them is tripled?

3. Why does the nose bleed while trekking to high altitude?

4. Hydropower should be used rather than coal and minerals. Explain with two reasons.

5.0 kg of water at $90^{o}C$ is cooled by mixing 20 Kg of water at $20^{o}C$. What is the final temperature of the mixture?

6. Write two differences between the modern periodic table and Mendeleev’s periodic table.

7. Change the following word equation into a balanced chemical equation.

1. Mercury+oxygen $\longrightarrow$ Mercurous Oxide
2. Lead Nitrate $\longrightarrow$ lead oxide+nitrogen dioxide + oxygen

8. What is basic salt? Give one example such as salt with a chemical formula.

9. Study the given electronic configuration of an element and answer the question below.

x= $1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{10},4s^{1}$. Name two ores of this element. Write its melting and boiling point.

10. What is the autonomic nervous system? Write its types.

11. Write two functions of leukocytes.

12. Write two differences between Down’s syndrome and Klineflter’s syndrome.

13. Write two reasons for selecting modern tissue culture for asexual reproduction.

14. What is Agenda 21? Write a full form of UNFCCC.

Group’C’

15. Study the given table and answer the following questions.

Substance	Amount of heat (Q)
A	1400J
B	2200J
C	8400J

 

1. Which substance will have maximum specific heat capacity if the same temperature is provided to each substance? Why?
2. Which substance will be suitable for cooling a hot engine? Why?
3. Write the relation of the specific heat capacity of B with its amount of heat.

16. What is the principal focus? Draw a ray diagram for a convex lens when it produces a diminished image.

17. Which gas is produced when magnesium carbonate is treated with hydrochloric acid? Write a balanced chemical equation that takes place in the container in the given condition. Name the solid obtained after cooling gas by reaction between  them at -$78^{o}$C

18. What is ceramics? Explain the method of producing different materials from ceramics.

19. Write down any three transportation functions of blood.

20. Write three differences between self-pollination and cross-pollination.

Group’D’

21. What is an electric bell? Explain the working of electric bells with a labelled diagram.

22. Study the given general formula and answer the following questions, $C_{n}H_{2n}$

1. What type of hydrocarbon will be formed by the given formula?
2. Write the structure of the formula of a given hydrocarbon containing three carbons atoms.
3. Write the root word and suffix of hydrocarbons formed by using a given general formula.
4. Which hydrocarbon will be formed by providing sufficient hydrogen to the above compound? Mention one use of that hydrocarbon.

23. What is a heterozygous organism? Give one example. Draw a chart to show offspring produced in F1 and F2 generation when a cross is made between pure black Guinea pig (BB) and pure white Guinea pig(bb).

24. Study the given table and answer the given question below.

1. Identify the comets A and C.
2. Why has A had a long period of revolution?
3. Write two differences between B and sun.

Name of comet	First observed	Revolution period
A	240 BC	6 years
B	1366 AD	33 years
C	1786 AD	3.3 years

Set-2 

Group’A’

1. Write a short answer to the following question.

1. Name two forces required to rotate a satellite in a circular path.
2. Write the relation between the upthrust and the density of the liquid.
3. Write the diameter and mass of the sun.
4. What is a laboratory thermometer?
5. Name any two types of a convex lenses.
6. What do you mean by metalloids?
7. Write one chemical reaction which takes place in the presence of sunlight.
8. Write a Latin word from which acid is derived. What is the meaning of that word?
9. Write the melting and boiling point of the metal that is extracted from the favourite.
10. How many chromosomes are there in unfertilized and fertilised eggs of honey bees?
11. What are dendrites?
12. l.What is the cause of haemophilia?
13. What is fragmentation?
14. What is kinetochore?
15. What types of sources of air pollution are forest fires and soil erosion? Why?

Group’B’

2. Why does the weight of an object be in the polar region rather than in the equatorial region of the earth?
3. In the table air, water and salt solution are given and answer the following questions.

Medium	Weight
A	25 N
B	30 N
C	35 N

1. Identify air and water.
2. Calculate upthrust in a salt solution.

4. Why is the sun considered the ultimate source of energy?

5. Write two properties of the heating element used in the heater.

6. Write two differences between d-block and f-block elements.

7. Give two examples of double displacement reactions.

8. Write uses of bell metal and german silver.

9. Write two differences between acetylene and olefins.

10. Write two functions of hormones produced by adrenal glands.

11. What type of asexual reproduction occurred in Chlamydomonas? How?)

12. What is tongue grafting? Explain with a suitable diagram.

13. Explain Mendel’s Law of dominance.

14. Explain the Nebular hypothesis.

Group’C’

15. A student sitting at the last bench of the classroom complains that he/she cannot read whatever is written on the board. Answer the question on the basis of the given statement.

1. What type of defect of vision is in the given situation? Why?
2. Write one cause of this defect.
3. Write a diagram to correct the given defect of vision.

16. What is an electric motor? What does it bring the domestic appliance?

17. Write two examples of the chemical properties of alkali when it reacts with certain salts and write them in balanced equation form.

18. Write three uses of gas production by reaction between sodium bicarbonates and sulphuric acid.

19. Draw labelled diagrams of metacentric, submetacentric and telo-concentric chromosomes.

20. What is arterial? Write the function of the renal artery and hepatic artery

Group’D’

21. What is an inverter? Write the working of the transformer with suitable diagram?

22. Study the given diagrams of laboratory preparation of ammonia gas. Answer the following questions.

1. How is ammonia collected in the jar? Why?
2. Write the reaction when this gas is treated with oxygen.
3. Write two uses of this gas.
4. Why is the lime tower used to collect ammonia gas?

23. Study the given sample of blood and answer the following questions.

1.  Name A, B, C and D
2. Write an average number of A and C for the normal human body.

24. What do you mean by metre? Write three differences between constellations and galaxies.

Set-3

Group’A”

1. Write short answers to the following questions.

1. What is weightlessness?
2. Name two instruments based on the law which states, "When pressure is applied in an enclosed fluid, then it is transmitted to all the direction of liquid”.
3. Write the formula which is used to calculate the amount of energy from decaying mass.
4. What do you mean by maximum and minimum temperature?
5. What is the reason for having an eye lens thick in shortsighted eyes?
6. Why is Na s-block element?
7. 2NaCl + Heat $\longrightarrow$Na+ $Cl_{2}$ what type of reaction is shown?
8. Name the acids which are found in lemon and sour milk.
9. What is paraffin?
10. Write the names of two types of silkworms found in Nepal.
11. What is cerebrospinal fluid?
12. What do you mean by gonads?
13. Where are erythrocytes destroyed?
14. Give two examples of sex-linked diseases.
15. Write one effect of benzene chloride.

Group’B’

2. Write two differences between gravity and gravitational force.

3. Write two characters of tungsten metal used in an electric bulb.

4. What are the two advantages of biofuel?

5. Study the given diagram and find the amount of heat and temperature from the given diagram based on kinetic theory of molecules of the substance.

6. write two differences between Bakellite and PVC.

7. What is silica glass? Why is glass called the fourth stage of matter?

8. Write two chemical properties of acid in which hydrogen and carbon dioxide are produced.

9. Write a molecular formula and one use of salt which contains calcium and sulphate ions.

10. Write two advantages of asexual reproduction which is carried by taking tissues of plants.

11. What is an allele? Give one example of it.

12. Write two advantages of asexual reproduction.

13. What is a chromosomal disorder? Write a haploid number of chromosomes in sugarcane and dog.

14. Write two differences between Saturn and Uranus.

Group’C’

15. Two heavenly bodies having mass m1 and m2 are separated by a distance ‘d’ what happens

1. If the masses of both bodies are doubled, keeping the distance between them constant?
2. If the distance between them is reduced by one-third keeping their masses constant?
3. If the distance between them is doubled and their masses are kept constant?

16. Draw the ray diagram for the lens, which gives a virtual and diminished image. Write the type of power of ens. Write SI units of power of the lens.

17. Write three chemical properties of gas which are prepared by heating ammonium carbonate.

18. The condensed formula of hydrocarbons is C$H_{3}$-CH=C$H_{2}$. Study the given formula and answer the following questions.

1. Write a general formula and molecular formula of a given hydrocarbon.
2. Write the root word and suffix of the given hydrocarbon.
3. Write the structural formula of hydrocarbons formed by removing two hydrogen atoms from a hydrocarbon.

19. What is pulmonary circulation? Show the diagrammatic figure of blood circulation.

20. The table shows the different glands and their roles and their roles in the human body. Answer the following questions on the basis of the given table.

Glands	Roles of gland
A	It secretes insulin and glucagon
B	It regulates the amount of calcium and phosphate in the blood
C	It is also called a stimulating hormone which stimulates other glands.

1. Identify A and B
2. Write the effect of hypo secretion of B
3. What is another name for C? Why?

Group ‘D’

21. What is a charger? Write three working mechanisms of solar cells.

22. Malathion and aldrin are two chemicals that are used to control insects. write four disadvantages of these chemicals. Also, write two uses of metal obtained from argentite.

23. The table shows the certain phase of the life cycle of honey bees. Answer the given question based on the given table.

Bee	Egg	Larva	Pupa	Total
X	3 days	5.5 days	7.5 days	16 days
Y	3 days	6 days	12days	21 days
Z	3 days	6 days	14.5 days	23.5 days

1. Identify the bees X and y.
2. Write about two differences between Y and Z.
3. Write one major function to be X.

24. What is the geological time scale? Write the name and time period of any three eras.