SEE Model Questions 2079 Science with Answers | Class 10 Compulsory Science Model Questions with Solutions

SEE Compulsory Science Model Questions Paper 2078 / 2079 with Solutions

Are you a Class 10 Students and preparing for SEE Compulsory Science Exam for the year 2079? If so, then you are in luck! We have presented you a complete SEE Model Questions of Science for year 2079 with their solutions which will definitely help you prepare for the Class 10 Science exam and develop confidence to get good result. If you are among those students who want to score good marks in SEE Science exam and believe in hard work then sit back, grab a pen and paper, and let's get started!

Group A [Knowledge types questions based on SEE Model Questions]

1. Define Universal Gravitation Constant 'G'.

Answer: Universal Gravitation Constant 'G' is the force of attraction between the bodies of unit masses separated by unit distance from their centre.

2. State Pascal’s law and name one instrument based on it.

Answer: Pascal's law of liquid pressure states that, "The pressure is equally transmitted perpendicularly on all sides as pressure is applied in the liquid kept in a closed container." Example: Hydraulic press, Hydraulic brake

3. What are the types of energy sources based on time of replacement? Write their names.

Answer: The types of energy sources based on time of replacement are Renewable source of energy and Non Renewable source of energy.

4. What is short sightedness?

Answer: lf an eye can see clearly the object at near point but cannot see clearly the object at far point is called myopia or, short sightedness.

5. Define 1 unit of electricity.

Answer: 1 unit or 1 kw.hr is the energy consumed by an electric appliance of 1 kilo watt power used for 1 hour.

6. State the Modern periodic law.

Answer: Modern Period Law state that, "The physical and chemical properties of elements are a periodic function of their atomic numbers."

7. What is meant by combination reaction?

Answer: The reaction in which two or more than two elements or compounds combine to form a single new compound is called a combination reaction. Example:

N₂+2H₂ ⟶ 2NH₃ (In presencce of 500°C/900atm)

8. Name any two bases with their molecular formula.

Answer: Sodium hydroxide (NaOH), potassium hydroxide (KOH)

9. Which metal can be extracted from bauxite ore?

Answer: Aluminium can be extracted from bauxite ore.

10. What is sex determination?

Answer: The process of determining the sex of a living organism is called sex determination.

11. What is hormone?

Answer: Hormone is a chemical messenger produced by endocrine glands and transported through the blood to different parts of the body to control and regulate the normal functioning.

12. What is chromosomal disorder?

Answer: A disorder that occurs in the human body due to the increase or decrease in the number of chromosomes is called chromosomal disorder.

13. Name any two organisms whish are reproduced by multiple fissions.

Answer: Chlamydomonas and Plasmodium

14. What is called mutation?

Answer: The variation that occurs suddenly is called discontinuous variation or mutation. For example, a newly born baby without leg, with extra finger on band, etc.

15. What is meant by depletion of ozone layer?

Answer: The thinning of ozone layer is known as ozone layer depletion.

Group: B [Understanding type SEE Model Questions Science]

16. Write any two points to justify that the urbanization bring energy crisis.

Answer: Increasing urbanization brings energy crisis due to the following reason:

1. Along with the increasing urbanization, the demand of petroleum products has been increasing day by day to run automobiles, industries, etc. Such enormous demand of energy brings energy crisis.
2. The urbanization of present day world is due to energy for heat, light and power. To meet the necessities of increasing population, the demand of energy sources is increasing throughout the world. But till now we are depending mainly on petroleum products, which cannot last longer as they are non-renewable energy sources and their stock is limited in nature. Therefore, we can say that the increasing urbanization brings energy crisis.

17. Study the given diagram and answer the following question.

(a) What is the weight of weighted object in air?

Answer: The weight of weighted object in air = 12 +2 = 14N = 12N.

(b) How much up thrust is exerted by the liquid on that object?

Answer: 2N up thrust is exerted by the liquid on that object.

(c) Calculate the mass of the object?

 Answer: $$\begin{gathered} Mass\left(m\right) = \frac{Force \left(F\right)}{Acceleration due to gravity\left(g\right)}\text{ \\ = 14N10[g=10m/s2]} \end{gathered}$$

= 1.4 kg.

Mass of that object is 1.4 kg

18. What type of transformer is given in the figure? What is used to laminate its core? The number of turns of primary coil and the number of turns on secondary coil in the transformer are never made equal, why?

Answer: Step-down transformer is given in the figure.

Shellac and varnish are used to laminate the core of transformer. the number of turns of primary coil and the number of turns on secondary coil in the transformer are never made equal because there is no change of voltage, working of transformer is done by AC voltage.

19. What can be done to increase the magnitude of current produced by bicycle dynamo? Give any two points

Answer:

1. Increasing the number of turns in the coil of dynamo.
2. Increasing the strength of the magnet used in the dynamo.

20. What is the cause for placing Calcium in IIA group of the modern periodic table?

Answer: The cause for placing Calcium in IIA group of the modern periodic table because their hydroxides are alkaline and they are found in earth's crust. Their valency is 2.

Ca + 2H₂O ⟶ Ca(OH)₂ + H₂

21. How is saturated hydrocarbon differed from unsaturated hydrocarbon? Give any two differences.

Answer: 

Saturated hydrocarbon	Unsaturated hydrocarbon
The hydrocarbons in which carbon atoms are connected by single covalent bond. Methane (CH4), Ethane (C2H6), Propane (C3H8) etc	The hydrocarbon compounds which have double or triple bond between carbon atoms, are known as unsaturated hydrocarbons. For example: Ethene (C2H4) and Ethyne (C2H2) etc.
They are also called alkanes or paraffins.	They are also called olefins.

22. Excessive use of chemicals fertilizers causes chemical pollution. How?

Answer:

1. Chemical fertilizer increases the acidity and basicity of soil.
2. Chemical fertilizer pollutes the water on the earth.

23. How does heat enhance the rate of chemical reaction? Explain in short.

Answer: Rate of chemical reaction is directly proportional to the heat and concentration of reactant. That is why heat enhances the rate of chemical reaction.

24. Write the difference between Cerebreum and Cerebellum.

Answer: The differences between cerebrum and cerebellum are given below.

S.N	Cerebrum	S.N	Cerebellum
1	It is a part of fore brain.	1	It is a part of hind brain.
2	It is the largest part of the brain.	2	It is the second largest part of the brain.
3	It overlaps midbrain.	3	It overlaps pons and medulla oblongata.
4	It contains various functional areas. It is mainly concerned with memory and intelligence.	4	It is mainly concerned with posture and balance (equilibrium)

25. Why vegetative propagation is beneficial to the farmers? Justify with two reasons.

Answer: Vegetative propagation is beneficial to the farmers due to the following reasons:

1. It is easier, less expensive and rapid method of propagation.
2. The species of rare and endangered plants can be preserved.

26. How can we get silk thread from the cocoon? Explain.

Answer: Cocoon is the puparium inside which larva converts itself into pupa. When larva moulds for fourth time then it leaves to take food and starts producing stick fluid. When this fluid come in contact with are it changes into silk and then it is woven around the body of larva of silkworm, we get silk thread from the cocoon.

27. What preventive measures should be adopted suffering from diabetes?

Answer: The Preventive measures of diabetes are:

1. Hypertension should be reduced.
2. Physical exercises should be taken regularly.
3. We should avoid smoking and drinking alcohol.
4. We should consume sufficient amounts of fruits and vegetables.

28. The tail of comet appears when it approaches near the sun? Explain.

Answer: When a comet approaches the sun, some of its frozen matter begins to evaporate into gases due to heat of the sun. These gases rush out by rapid vaporization in the form of jets, carrying solid particles with them. In this way, a long tail of a comet is formed due to the motion of the comet and effect of solar wind.

Group: C [Application type Science Model Questions 2079]

29. If the mass of moon 7.2×1022kg is  and radius 1.7×106m  than find the acceleration due to gravity on the surface moon.What is the weight of man in moon with mass 60 kg? Find out.

Answer: Here, Mass of the moon (M) = $7.2\times {10}^{22}kg$

Radius of the moon (R) = $1.7\times {10}^{6}m$

Gravitational Constant (G) = $6.67\times {10}^{-11}N{m}^2/k{g}^2$

Acceleration due to gravity (g) =?

We know that, g = $= \frac{6.67\times {10}^{-11}\times 7.2\times {10}^{22}}{{(1.7\times {10}^6)}^2}$

=1.66 m/s2

Again, m = 60 kg

 Weight of man on moon (W) = mg = 66 x 1.66 = 99. 6N.

30. Study the given table of specific heat capacities of the three different substances and answer the following questions.

Substance	Specefic heat capacities
A	910J/ kg°C
B	380 J/kg°C
C	470 J/kg°C

(a) What is meant the specific heat capacity of substance A is 910J/kg°C?

Answer: It means lkg of the metal 'A' requires 910j heat energy to raise its temperature by 1°C.

b) Which one of the given substance will gain more temperature while heating equal mass of all the three substances with equal amount of heat? Give reasons.

Answer: "B' will gain more temperature while heating equal mass of all the three substances with equal amount of heat because its specific heat capacity is less than other substance.

(c) Which will go down more in depth while keeping equal mass of three substances heated for the same temperature of 100°C on the Wax slab, why?

Answer:"A' will go down more in depth while keeping equal mass of three substances heated for the same temperature of 100°C on the Wax slab because its specific heat capacity is more than other substance.

31. Write any three applications of ceramics.

Answer:

1. Ceramics are used for making household pottery, jugs, tiles, bowls, cup, sinks, flower case, bathroom fittings, etc.
2. Being poor conductor, ceramics are used for making furnace, as insulators in television sets, electric fittings, etc.
3. Ceramics are used for making artificial joints, teeth, bones, and porcelain.

32. Write down any three examples of neutralization reaction applied in our daily life.

Answer: The three examples of neutralization reaction applied in our daily life are:

HCl + NaOH ⟶ NaCl + H₂O

HNO₃ + NaOH ⟶ NaNO₃ + H₂O

Mg(OH)₂ + 2HNO₃ ⟶ Mg(NO₃)₂+ 2H₂O

33. How does artificial reproduction help in the excess production of fruits?

Answer:  Artificial reproduction help in the excess production of fruits because of the following reasons:

1. By using tissue culture method a large number of plants can be propagated by using meristem of plants.
2. By grafting and layering different kinds of plants can be grown.
3. Endangered plants can be conserved.

34. How would you conserve and manage the sources of water?

Answer:

1. We would conserve and manage the sources of water by following method:
2. We should keep the sources of water clean.
3. Bathing, washing clothes and throwing wastes into the sources of water should be avoided.
4. Overuse of insecticides and chemical fertilizers should be avoided.
5. We should plant tree near the sources of water.

Group D [Higher ability questions for SEE Science Exam]

35. Complete the ray diagram given alongside. Also mention the nature of the image thus formed. If the power of hand lens is +5D, What should be the distance between hand lens and the book to read properly?

Answer: Nature of the image formed:

The image is real.

The image is inverted.

The image is diminished.

Given, Power (P) = +5D

Focal length (f) =?

According to the formula, P = $\frac{1}{f}$

or, +5 = $\frac{1}{f}$

or, f = 0.2m

or, f=20cm

36. The given figure shows the laboratory preparations of ammonia gas. Answer the below mentioned questions after observing the given figure.

(a) Write the balance chemical reaction to prepare ammonia gas in the laboratory by the method shown in the given figure.

Answer: The chemical reaction for the lab preparation of ammonia is:

 2NH₄Cl + Ca(OH)₂ ⟶ CaCl₃ + 2H₂O + 2NH₃

(b) Why the mouth of hard glass test tube is placed in inclined downward position during preparation?

Answer: On heating the mixture NH₄Cl + Ca(OH)₂ water also is formed. If test tube is straight there is a chance of back flow of water and it may crack as result ammonia gas cannot be collected. To prevent from cracking and to collect ammonia gas test tube is inclined down ward.

(c) Ammonia gas cannot be collected over /through water, why?

Answer: Ammonia gas cannot be collected over water because it is highly soluble in water.

(d) Which colour/types of litmus paper can help to confirm that the gas jar is filled with ammonia gas?

Answer: Wet red litmus paper.

37. Draw the chart to show both phenotype and genotype structure of the result obtained in the first and second filial generation of off spring of mouse ,having black colour and white colour according to Mendel 's experimental result .With the help of the same chart write the ratio of phenotype and genotype of second generation.

Result of second generation

Phenotypic ratio: 3: 1

Genotypic ratio = 1:2:1

38. Explain the evolution process occurred on the Mesozoic and Cenozoic era. Also mention their difference.

Answer:

Mesozoic Era: Reptiles like dinosaurs were evolved, they were developed and increased in number and at the end of this era they disappeared.lt is known as era of reptiles or dinosaurs.

Cenozoic Era: Mammals like horse, whale, dolphin, sharp toothed cats and monkeys owl etc were appeared and herbal plants were evolved in this period. lt is also known as era of mammals.

S.N	Mesozoic Era	S.N	Cenozoic Era
1	The duration of this era was 25 crore years ago to 6 crore 55 lakh years ago.	1	The duration of this era is 6 crore 55 lakh years ago to the date.
2	Dinosaurs were present.	2	Dinosaurs are absent.
3	This era is divided into three periods.	3	This era is divided into two periods.
4	Human beings were absent.	4	There is dominance of human beings.

Note: These all questions are according to the SEE new model questions 2074 issued by CDC

Also Read:

SEE Model Questions of Social With Answers.

SEE Model Questions with Answers of Account.