4.

Plants can be made diseases-resistant by [1]

a) both hybridisation and genetic modification b) hybridisation

Class IX Session 2024-25 c) use of antibiotic d) genetic modification

Subject - Science 5. The plant tissue provides mechanical strength and consists of living cells, is [1]
Sample Question Paper - 10
a) sclerenchyma b) parenchyma

c) collenchyma d) aerenchyma

Time Allowed: 3 hours Maximum Marks: 80 6. Most of the substances in the living world are transported across the cell membrane by the process of: [1]

General Instructions: a) osmosis b) diffusion

1. This question paper consists of 39 questions in 5 sections. c) endocytosis d) plasmolysis

2. All questions are compulsory. However, an internal choice is provided in some questions. A student is expected to 7. The maximum amount of sodium that can be obtained by electrolysis of 117 g of sodium chloride is [1]
[Atomic mass of Na = 23 u, Cl = 35.5 u]
attempt only one of these questions.

3. Section A consists of 20 objective type questions carrying 1 mark each. a) 40 g b) 52 g

4. Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these questions should in the c) 23 g d) 46 g

range of 30 to 50 words. 8. The epithelium is separated from the underlying connective tissue by [1]

5. Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should in a) thick deposition of fat b) mucosa

the range of 50 to 80 words. c) vesicles d) basement membrane

6. Section D consists of 3 Long Answer type questions carrying 05 marks each. Answer to these questions should be 9. In the following figure the zero error is: [1]

in the range of 80 to 120 words.

7. Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-parts.

Section A
1. Following figure shows three states of matter and its interconversion. Which process display in A and B? [1]

a) 5 gwt b) – 5 gwt

c) 2 gwt d) – 2 gwt
10. Which of the following figures represent uniform motion of moving object correctly? [1]

a) (A)Sublimation (B) condensation b) (A) Fusion (B) Solifification a) b)

c) (A) Vapourisation (B) Condensation d) (A) Fusion and (B) Condensation

2. The cell organelle involved in forming complex sugars from simple sugars are [1]

a) Endoplasmic reticulum b) Plastids

c) Golgi apparatus d) Ribosomes

c) d)
3. A body moving with uniform acceleration has velocities 20 ms-1 and 30 ms-1. when passing two points A and B. [1]
Then the velocity midway between A and B is:

a) 25.5 ms-1 b) 24 ms-1

c) 25 ms-1 d) –
10√6 ms-1
11. Fill in the gap using given analogy [1]

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 Atomic number : Number of protons :: Mass number : _______. Reason (R): Two bones can be connected to each other by another type of connective tissue called the ligament.
This tissue is very elastic. It has considerable strength.
a) Number of protons + Number of electrons b) Number of neutrons + Number of protons
c) Number of electrons d) Number of protons a) Both A and R are true and R is the correct b) Both A and R are true but R is not the
explanation of A. correct explanation of A.
12. Which of the following tissues has dead cells? [1]
c) A is true but R is false. d) A is false but R is true.
a) Collenchyma b) Epithelial tissue
20. Assertion (A): Thomson's model of an atom is popularly known as the plum pudding or Christmas pudding [1]
c) Parenchyma d) Sclerenchyma
model of an atom.
13. Which of the following cell functions will stop, if its ribosomes are destroyed? [1] Reason (R): According to the Thomson's plum pudding model, an atom is a positively charged sphere in which
a) Formation of complex sugars b) Lipid metabolism the electrons are embedded.
c) Protein synthesis d) ATP synthesis a) Both A and R are true and R is the correct b) Both A and R are true but R is not the
14. Rusting of an article made up of iron is called [1] explanation of A. correct explanation of A.
a) corrosion and it is a physical as well as b) dissolution and it is a physical c) A is true but R is false. d) A is false but R is true.
chemical change Section B
21. The work done in lifting a box on to a platform does not depend upon how fast it is lifted up. Explain your [2]
c) dissolution and it is a chemical change d) corrosion and it is a chemical change
answer giving proper reason.
15. Boiling points of a few gases are given below: [1]
OR
Gas W X Y Z
Why does a block of plastic released under water come up to the surface of water?
Boiling point (oC) -152 -246 -196 -183 22. Why is it that on increasing the wind speed the rate of evaporation increases? [2]
23. Explain how defects in a metal block can be detected using ultrasound. [2]
If liquid mixture of these gases is fractionally distilled, the order of gases distilling out from first to last is
24. A wooden table should be called a solid. Give reason. [2]
a) Z, X, Y, W b) X, Y, Z, W
25. Explain why some of the leaves may get detached from a tree if we vigorously shake its branch. [2]
c) W, X, Y, Z d) Y, X, Z, W OR
16. Kharif season extends from [1] Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates
from rest?
a) April to June b) January to March
26. Find the percentage composition of sucrose C12H22O11. [2]
c) June to October d) October to January
Section C
17. Assertion (A): Motion with uniform velocity is always along a straight-line path. [1]
27. i. What is the difference between echo and reverberation? [3]
Reason (R): In uniform velocity a motion, speed is the magnitude of the velocity and is equal to the
ii. How can we reduce reverberation in an auditorium or a big hall?
instantaneous velocity.
iii. Which materials are good absorbers of sound?
a) Both A and R are true and R is the correct b) Both A and R are true but R is not the iv. Why we can hear more clearly in a room having curtains?
explanation of A. correct explanation of A.
28. What is the basic difference between the isotopes of an element? [3]
c) A is true but R is false. d) A is false but R is true. 29. The position of a body at different times is recorded in the table given below:- [3]
18. Assertion (A): A gas fills completely the vessel in which it is kept. [1] Time (s) 0 1 2 3 4 5 6 7 8
Reason (R): Intermolecular force of attraction between the particles of gas is negligible.
Displacement (m) 0 6 12 18 24 30 36 42 48
a) Both A and R are true and R is the correct b) Both A and R are true but R is not the
i. Draw the displacement time graph for the above data.
explanation of A. correct explanation of A.
ii. What is the slope of graph?
c) A is true but R is false. d) A is false but R is true. iii. What is the velocity of the motion?
19. Assertion (A): 1-day Vinita went to see his brother's competition and he saw his brother in pain and not able to [1] OR
run comfortably. The graph given below shows the positions of a body at different times. Calculate the speed of the body as it moves
from
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 i. A to B OR
ii. B to C i. Suppose the mass of the earth somehow increases by 10% without any change in its size. What would happen to
iii. C to D your weight?
ii. Suppose the radius of the earth becomes twice of its present radius without any change in its mass. What will
happen to your weight?

35. i. Describe the role played by the lysosomes. Why are they termed as suicidal bags? How do they perform their [5]
function?
ii. What happens to the dry raisins, when placed in plain water for some time? State the reason for whatever is
observed. What would happen if these raisins are then placed in concentrated salt solution?
OR
30. Give reason : An iron nail sinks in water, but a ship made of iron floats. [3]
i. State what will happen when human red blood cells are placed in a hypotonic salt/sugar solution.
31. The following is the distance-time table of an object in motion: [3]
ii. Why plant cell shrinks when kept in a hypertonic solution.
Time (in second) Distance (in metre)
iii. Why lysosomes are known as suicidal bags?
0 0 36. Name the process associated with the following: [5]
1 1 i. Dry ice is kept at room temperature and at one atmospheric pressure.

2 8 ii. A drop of ink placed on the surface of water contained in a glass spreads throughout the water.
iii. A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.
3 27
iv. A acetone bottle is left open and the bottle becomes empty.
4 64 v. Milk is churned to separate cream from it.

5 125 vi. Settling of sand when a mixture of sand and water is left undisturbed for some time.
vii. Fine beam of light entering through a small hole in a dark room, illuminates the particles in its paths.
6 216
Section E
7 343 37. Read the following text carefully and answer the questions that follow: [4]

i. What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing or zero? Permanent tissues are of two types that is Simple permanent tissues and Complex permanent tissues.

ii. What do you infer about the force acting on the object? Simple permanent tissues subdivided as follows:

32. What is the difference between plasma membrane and cell wall ? Give the functions of each one. [3] i. Parenchyma: Tissues provide support to plants. They are loosely packed and has large intracellular space.
OR Parenchyma with chlorophyll which performs photosynthesis is called chlorenchyma.
Write short note on nucleus. ii. Collenchyma: Tissue are thickened at the corners, have very little intercellular space. It allows easy bending
33. The transportation system of plants is composed of complex permanent tissue. They have their transportation [3] of various parts of a plant without breaking.
system within themselves. Justify in detail with appropriate diagrams. iii. Sclerenchyma: Cells of this tissue are dead and commonly seen in the husk of a coconut.
Section D
34. i. At some moment, two giant planets Jupiter and Saturn of the solar system are in the same line as seen from [5]
the earth. Find the total gravitational force due to them on a person of mass 50 kg on the earth. Could the
force due to the planets be important?
Mass of the Jupiter = 2 × 1027 kg

Mass of the Saturn = 6 × 1026 kg

The distance of Jupiter from the earth = 6.3 × 1011 m
i. In which of the simple plant tissue, deposition of lignin is found? Also describe lignin. (1)
The distance of Saturn from the earth = 1.28 × 1012 m
ii. Why is cork impervious to gases and water? (1)
ii. A bag of sugar weighs 'w' at a certain place on the equator. If this bag is taken to Antarctica, then will it
iii. Which type of tissue is present in the cortex of the root and veins of the leaves? (2)
weigh the same or more or less. Give a reason for your answer.
OR

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 Which tissue in plants provides them flexibility? (2)
38. Read the following text carefully and answer the questions that follow: [4]
Cropping pattern refers to the proportion of land under cultivation of different crops at different points of time.
Intercropping is the practice of growing more than one crop on the same field at the same time in a definite row
pattern. It is much superior to mixed cropping. Intercropping can incorporate crop rotation. The technique makes
the farmers busy throughout the year. Productivity is increased. Soil erosion is prevented. Pests and weeds
remain under control.
i. What is Inter-cropping? (1)
ii. Why intercropping is superior to all other means of cropping? (1)
iii. Which method of cropping prevents soil erosion by checking soil creep after harvesting a crop? (2)
OR
Modern cropping is based on machines from sowing to harvesting. Which is the best method of cropping for
this? (2)
39. Read the following text carefully and answer the questions that follow: [4]
A solution of a solid in a liquid such as water can be prepared by adding it slowly to water with constant stirring
at a certain temperature (room temperature). If the addition process is continued, a stage is ultimately reached in
the dissolution process when no more of the solid dissolves. Rather it starts setlling at the bottom of the
container such as a glass beaker. The solution at this stage is said to be saturated. The solubility of a solute is
always expressed with respect to the saturated solution. It may be defined as the maximum amount of the solute
that can be dissolved in 100 g of the solvent to form a saturated solution at a given temperature. Please
remember that the role of temperature is very important. If temperature is increased, the solution becomes
unsaturated. In case the temperature is decreased, the solution becomes supersaturated. As a result, crust of the
solute gets deposited on the surface.
i. What do mean by the term Solubility? (1)
ii. 20 g of a solute are dissolved in 500 g of the solvent. The solubility of the solute is: (1)
iii. When a saturated solution becomes unsaturated? (2)
OR
What do you mean by concentration of solution? (2)
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