SEE 2081(2025) | Compulsory Science Question Paper Solution | Bagmati Province

see 2081-2025 compulsory science question paper solution bagmati province
DR Gurung
SEE-2081-2025-Compulsory-Science-Question-Paper-Solution-Bagmati-Province
Dear Boys and Girls, we provide you the SEE 2081-2025 Compulsory Science Question Paper Solution Bagmati Province, subject code RE-1041'KoP'. Grade 10, Secondary Education Examination (SEE) was started from the date Chaitra 07, 2081 (March 20, 2025) and ended on Chaitra 19, 2081 (April 01, 2025). The solution of SEE 2081-2025 Compulsory Science question paper for Bagmati Province is designed to help all kinds of people - whether you’re a student who wants to check your answers after practicing, a teacher looking for useful materials to use in class, or a parent trying to support your child as they prepare for SEE Exam. We’ve put a lot of care into making this resource clear and accurate, so it can be a real help to everyone who uses it.

The SEE 2081 Science (Bigyan) Bagmati Province solution is a vital tool for Class 10 students in Nepal to confirm their answers and boost their confidence. For those gearing up for SEE 2082, it’s a motivating resource to fuel your preparation and achieve academic success. Harness this guide, trust in your potential, and let your determination light the way to a brilliant future!

We hope this article provides a detailed overview of the Compulsory Science question paper with solution from Bagmati Province to help student analyze the exam pattern and prepare effectively for the future exams. Good Luck Lads!

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SEE 2081 (2025) Compulsory Science Question Paper Solution Bagmati Province.

SECONDARY EDUCATION EXAMINATION [SEE]
Compulsory Science (Bagmati Province)
Grade 10 (Solution)
SEE – 2081 (2025)
RE-1041'BP'
Full Marks – 75
Time - 3 hrs

Candidates are required to answer the questions in their own words as far as practicable. Figures in the margin indicate the full marks.

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Attempt ALL The Questions.

Section "A"

Multiple Choice Questions

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

1.(a) How many genetic units are housed within a human skin cell?
(i) 40
(ii) 42
(iii) 44
(iv) 46
Answer: (iv) 46

b. What formula precisely determines the focal length of a lens?
(i) P = 1/f
(ii) M = 1/f
(iii) P = f
(iv) f = u
Answer: (i) P = 1/f


c. Which valve manages the blood flow from the right ventricle to the right auricle?
(i) Aortic valve
(ii) Bicuspid valve
(iii) Pulmonic valve
(iv) Tricuspid valve
Answer: (iv) Tricuspid valve

d. Which medicinal plant offers antibacterial benefits while supporting digestion?
(i) Neem
(ii) Heart-leaved moonseed
(iii) Asiatic pennywort
(iv) Holy basil
Answer: (iv) Holy basil

e. Which alcohol contains two hydroxyl groups in its structure?
(i) Ethanol
(ii) Ethylene glycol
(iii) Methanol
(iv) Glycerol
Answer: (ii) Ethylene glycol

f. If the Earth were compressed to the size of the Moon, how would its gravitational force be affected?
(i) It increases
(ii) It decreases
(iii) It becomes zero
(iv) It remains the same
Answer: (i) It increases

g. Which statement best describes the operation of electric motors and generators?
(i) Electric motor changes electrical energy into kinetic energy
(ii) Electric generator changes electrical energy into kinetic energy
(iii) Both electric motor and generator change electrical energy into mechanical energy
(iv) Both electric motor and generator work on the same principle
Answer: (i) Electric motor changes electrical energy into kinetic energy

h. What factors determine an object’s capacity to retain heat?
(i) Mass of matter
(ii) Volume of matter
(iii) Temperature of matter
(iv) Nature of matter
Answer: (iv) Nature of matter

i. Which unit corresponds to the energy measured in Joules?
(i) kg ms⁻²
(ii) kg ms⁻¹
(iii) kg m²s⁻²
(iv) kg ms⁻³
Answer: (iii) kg m²s⁻²

j. If a 500 N force is applied to piston A with an area of 2000 cm², what force does piston B with an area of 350 cm² experience?
(i) 875 N
(ii) 975 N
(iii) 1075 N
(iv) 1175 N
Answer: (i) 875 N

Using Pascal’s principle, pressure is constant across the fluid, so the force on piston B is (500 × 350) / 2000 = 875 N.

Section "B"

Very Short Answers

2. (a) What is the name of the blood vessel that carries blood from the heart to different parts of the body?

Answer: Arteries are the blood vessel that carry blood from heart to different parts of body.

(b) Write the name of the compound which is formed when ammonia dissolves in water.
Answer: Ammonium Hydroxide (NH4OH) is formed when ammonia dissolves in water.

(c) Why does carbon dioxide gas collected in an erect gas jar?
Answer: Carbon Dioxide is collected in erected dry gas jar because it is 1.5 times heavier than air.

(d) Write a precaution to be taken by a good netizen.
Answer: A good netizen should always avoid sharing fake news.

(e) What change does a negative catalyst do in the rate of chemical reaction?
Answer: Negative catalyst decreases the rate of chemical reaction.

(f) Why is detergent considered less eco-friendly than soap? Give one reason.
Answer: Detergents are considered less eco friendly as compared to soap because due to different chemical composition detergents have high probability to pollute water.

(g) When black (BB) and brown (bb) dogs are crossed, what is the genotypic ratio at second filial generation?
Answer: When black(BB) and brown (bb) are crossed, the genotypic ratio in second filial generation will be 1:1.

(h) A student has faced difficulties in reading letters on the board from the last bench due to a defect of vision. Draw a ray diagram of the problem of that person.
Answer:
(i) Calculate the refractive index of water, if the speed of light in water is 2.25 × 10⁵ m/s and in air is 3 × 10⁸ m/s.
Answer: The refractive index of water (n) is calculated using the formula:
n = cair ∕ cwater
Where:cair = 3 × 10⁸ m/s (speed of light in air)
cwater = 2.25 × 10⁵ m/s (speed of light in water)

Substituting the values:
n = 3 × 10⁸ ∕ 2.25 × 10⁵ = 1333.33

The refractive index of water is  1333.33

Section "C"

Short Answers

3. Write any two characteristics of worker bee.

Answer: The two characteristics of worker bee are:

i) They are diploid having 32 chromosome.
ii) They are formed from fertilized eggs.

4. Mention any two effects of climate change.

Answer: The two effects of climate change are:

i) Global warming.
ii) Extinction of various plants and animals.

5. Write two differences between independent and dependent variables.

Answer: The two differences between independent and dependent variables are:-

Independent VariableDependent Variable
(i) The independent variable is changed or controlled in an experiment.(i) The dependent variable is affected by the change in the independent variable.
(ii) It is also called manipulating variable.(ii) It is also called responding variable.

6. Write class of sparrow and division of fern.

Answer:

Sparrow
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Classes: Aves

Fern
Kingdom: Plantae
Division: Tracheophyta
Subdivision: Pteridophyta

7. What difficulties would have Mendel faced if he had used apple plant instead of pea for his experiment? Write in two points.

Answer:

Mandel would have faced following problems if he had used Apple instead of pea plant:
(i) Apple has longer life span so, it would take more time to conclude the experiment.
(ii) Apple has complex cross-pollination as compared to pea plant.

8. In the given figure, what does 16 N represent? What should be the weight of the object to float on the water?

weight-of-the-object-to-float-on-water
weight of the object to float on water

Answer:

- In the above figure, 16 N indicates upthrust of the liquid to the object or wt. of liquid displaced.
- If the weight of the object is 16 N, it would float on the water.

9. Differentiate between the flat universe and closed universe in two points.

Answer:

The two differences between the flat universe and closed universe are -
Flat UniverseClosed Universe
(i) The value of average density is equal to the critical density.(i) The value of average density is greater than the critical density.
(ii) The size of universe remain constant.(ii) The size of this type of universe becomes smaller and collapse.

10. Answer the questions on the basis of given chemical equations.

Reaction (A): MgO + H₂O → Mg(OH)₂
Reaction (B): Zn + dil H₂SO₄ → ZnSO₄ + H₂
(i) Out of these two chemical equations, which one is the combination reaction?
(ii) What happens when concentrated H₂SO₄ is used instead of dilute H₂SO₄ in chemical reaction B?

Answer:

(i) Out of these two chemical equations, which one is the combination reaction?
Answer: Among the given two reactions, the reaction 'A' is combination reaction.

(ii) What happens when concentrated H₂SO₄ is used instead of dilute H₂SO₄ in chemical reaction B?
Answer: When concentrated H₂SO₄ is used, zinc reacts differently to produce SO₂ and water. The reaction is as follows:
Zn + 2H₂SO₄ (conc.) → ZnSO₄ + SO₂ + 2H₂O

11. Draw a neat and clean diagram of laboratory preparation of carbon dioxide. Write the name of salt used in this process.

Answer: 

diagram - laboratory preparation of carbon dioxide

The salt used in the laboratory preparation of CO₂ gas is calcium carbonate (CaCO₃).

12. Although the use of pesticides is considered a major concern for agriculture, write two reasons why its use continues.

Answer:

Although the use of pesticides is considered a major concern for agriculture, any write two reasons why its use continues are:

i) Effective paste control: Pesticides provide quick and reliable protection against pests, insects, fungi and weeds that can destroy crops.

ii)Increased agricultural productivity : By controlling pests, pesticides help in maintaining high yields and improving the quality of crops.

13. Among the animals Peacock, Crocodile, Snake, Whale, and Sea-horse, which are the mammals and which is the least developed animal?

Answer:

Among the listed animals, the Whale is the only mammal.

Mammals are characterized by features such as giving birth to live young (with a few exceptions like monotremes), having hair or fur, and producing milk to feed their young. The Peacock, Crocodile, Snake, and Sea-horse are not mammals.

The least developed animal in this group would be the Sea-horse. While all these animals have evolved to survive in their environments, the Sea-horse is often considered one of the most primitive in terms of its body structure and behaviors compared to the others.

14. How much heat energy is required to raise the temperature of 700 g of water from 5°C to 40°C?

Answer: To calculate the heat energy required to raise the temperature of water, we can use the formula:

Q = mcΔT Where: - Q is the heat energy (in joules), - m is the mass of water (in grams), - c is the specific heat capacity of water (4.18 J/g°C), - ΔT is the change in temperature (in °C). Given: - m = 700 g, - c = 4.18 J/g°C, - ΔT = 40°C - 5°C = 35°C. Now, we can plug the values into the formula: Q = 700 g × 4.18 J/g°C × 35°C Q = 102,130 J Therefore, the heat energy required to raise the temperature of 700 g of water from 5°C to 40°C is 102,130 joules.

Here is a simple diagram to illustrate the heat energy process:
heat-energy-process
heat energy process

15. If you are applying the process shown in the diagram to get pure silver from impure silver, then

get-pure-silver-from-impure-silver
get pure silver from impure silver
(i) Between A and B, in which part will you put impure silver?
(ii) What is the role of 'C' in obtaining pure silver?

Answer:

(i) Between A and B, in which part will you put impure silver?
Answer: I will put impure silver in the positive terminal, i.e., 'A'.

(ii) What is the role of 'C' in obtaining pure silver?
Answer: The role of 'C' is to act as the electrolyte, which contains a solution of a salt of silver (such as silver nitrate). During electrolysis, silver ions from the solution get deposited on the negative terminal (cathode, 'B'), which is made of pure silver, while impure silver from the anode ('A') dissolves into the solution. This helps in the purification of silver.

16. Write the structural formula of the saturated hydrocarbon having molecular mass 44 amu. Write the IUPAC name of the saturated hydrocarbon having molecular mass 44 amu. Write the IUPAC name of the compound which is obtained by removing two hydrogen atoms from adjacent carbons.

Answer:

The molecular mass of 44 amu corresponds to the saturated hydrocarbon propane (C₃H₈).

Structural formula of propane: CH₃–CH₂–CH₃

IUPAC name of the saturated hydrocarbon with molecular mass 44 amu: Propane

If two hydrogen atoms are removed from adjacent carbon atoms of propane, the resulting compound is an alkene with a double bond between those carbons. The compound formed is propene (C₃H₆).

IUPAC name of the compound formed: Propene

Section "D"

Write long answers to the following questions:

17. Write any two characteristics of s-block and p-block elements of modern periodic table.

Answer:

The two characteristics of s-block and p-block elements of modern periodic table are -
s-block elements
(i) They are very reactive.
(ii) They form ionic compounds easily.

p-block elements
(i) They include metals, non-metals, and metalloids.
(ii) They can show different oxidation states.

18. Find independent and dependent variables in the following events.

(i) more growth of plant in sunlight.
(ii) Measuring the stretch of a catapult and the distance covered by the stone thrown by it.

Answer:

(i) more growth of plant in sunlight.
Ans: independent = sunlight
         dependent = growth
(ii) Measuring the stretch of a catapult and the distance covered by the stone thrown by it.
Ans:  stretching = independent
          speed of stone = dependent

19. Draw a diagram to show the dispersion of white light as it passes through a prism. Write two causes of dispersion of light.

Answer:

Diagram:
The two causes of dispersion of light are-

i. Different colours of light travel at different speeds in a prism.
ii. Each colour bends (refracts) by a different amount when passing through the prism.

20. Analyze the blood cell counts of a person based on the following data:

Blood CellsNo. of Blood Cells
W30,000,000
X3,000,000
Y3,500,000

(i) Which blood cell count is within the normal range?
(ii) What issue arises from the X blood cell count?
(iii) If Y drops to 1,500,000, what problem might occur?
(iv) Name the blood cell W.

Answer:


(i) Blood cell'Y' is in normal condition.

(ii) A problem that arises due to the number of X blood cells is leukopenia when WBC is less than normal range it is caused.

(iii) If the count of Y decrease and reaches 1,50,000 the person will be affected by 'Thermobocytopenia'

(iv) The blood cell 'W' is red blood cells.

21.When 240 V is passed in the primary coil of a transformer, 480 V is induced in secondary coil, if there are 300 turns in primary coil how many turns will be in secondary coil?

(i) A transformer converts primary voltage 240 V into secondary voltage 300 V. When 480 V is induced in the primary coil, how many turns will be in secondary coil, if there are 300 turns in the primary coil?
(ii) Why is the core of a transformer laminated?
(iii) Can a transformer run successfully on a DC circuit? Give reason.

Answer:

(i) A transformer converts primary voltage 240 V into secondary voltage 300 V. When 480 V is induced in the primary coil, how many turns will be in secondary coil, if there are 300 turns in the primary coil?

Answer:
We use the transformer formula:
Vs / Vp = Ns / Np

Where:
Vs = Secondary voltage
Vp = Primary voltage
Ns = Number of turns in secondary coil
Np = Number of turns in primary coil

Given:
Vp = 240 V, Vs = 300 V, Np = 300 turns

First, find the turn ratio:
(300 / 240) = Ns / 300
⇒ Ns = (300 × 300) / 240 = 375 turns

Now for the second case:
When Vp = 480 V and using the same ratio:
Ns / 300 = 300 / 240
⇒ Ns = (300 × 480) / 240 = 600 turns

(i) Number of turns in secondary coil = 600 turns

(ii) Why is the core of a transformer laminated?
Answer:  The core of a transformer is laminated to reduce energy loss due to eddy currents. Laminating the core increases electrical resistance and minimizes circulating currents that produce heat.

(iii) Can a transformer run successfully on a DC circuit? Give reason.
Answer: A transformer cannot work on a DC circuit because DC current does not produce a changing magnetic field. Electromagnetic induction (needed to induce voltage in the secondary coil) requires a time-varying magnetic field, which only AC current provides.

22. Nowadays infertility treatment is done by artificial insemination method. In this method, sperms are collected from a male animal by artificial methods and fertilization is done by inserting sperms mechanically into the uterus of a female.

(i) Write any two advantages of this technology.
(ii) Write two points to be considered while performing this technology.

Answer:

(i) Write any two advantages of this technology.
Answer:
a) It helps in improving the breed of animals by selecting genetically superior males.
b) It increases the chances of fertilization even if the male and female are far apart or if the male has low fertility.

(ii) Write two points to be considered while performing this technology.
Answer:
a) Sperms must be collected and stored in a hygienic and controlled environment to prevent contamination.
b) The procedure must be done at the correct time in the female's reproductive cycle to increase the chances of successful fertilization.

23. In the given figure, mass of objects A and B is 6 × 10²⁴ kg and 400 kg respectively, and the radius of A is 6400 km.

(i) Calculate the gravitational force between the objects A and B.
(ii) What height should the body B be taken from the surface of the body A so that the value of acceleration due to gravity becomes 6 m/s²?

Answer:

(i) Calculate the gravitational force between the objects A and B.
Answer:
Using the formula:
F = (G × M × m) / r²

Where:
G = 6.674 × 10-11 Nm²/kg²
M = 6 × 1024 kg
m = 400 kg
r = 6400 km = 6.4 × 106 m

Substituting values:
F = (6.674 × 10-11 × 6 × 1024 × 400) / (6.4 × 106)²
F = 3910 N
Gravitational Force = 3910 N

(ii) What height should the body B be taken from the surface of the body A so that the value of acceleration due to gravity becomes 6 m/s²?
Answer:
Use the formula:
gh = g × (R / (R + h))²

Where:
gh = 6 m/s²
g = 9.8 m/s²
R = 6400 km = 6.4 × 106 m

6 / 9.8 = (R / (R + h))²
√(6 / 9.8) ≈ R / (R + h)
(R + h) / R ≈ √(9.8 / 6) ≈ 1.28
R + h = 1.28R
h = 0.28R = 0.28 × 6.4 × 106 = 1.792 × 106 m

Height = 1.792 × 10⁶ m = 1792 km.

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