Class 9 Science: Sample Practice Question Paper- 2 PDF Download

 Page 1


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
CBSE 
Class IX Science 
Sample Paper - 2 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be 
answered in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be 
answered in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name the bacterium responsible for denitrification in nature. (1) 
 
2. Which method is the most effective for destroying insects in stored grains—spraying or 
fumigation?  (1) 
 
Section B 
 
3. Explain any two factors affecting the value of g. (2) 
OR 
 Can a body have mass but no weight? Give reasons.  
 
4. How do cathode rays differ from anode rays?  (2) 
 
5. Why do we get a crunchy and granular feeling when we chew pears? (2) 
 
 
 
 
Page 2


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
CBSE 
Class IX Science 
Sample Paper - 2 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be 
answered in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be 
answered in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name the bacterium responsible for denitrification in nature. (1) 
 
2. Which method is the most effective for destroying insects in stored grains—spraying or 
fumigation?  (1) 
 
Section B 
 
3. Explain any two factors affecting the value of g. (2) 
OR 
 Can a body have mass but no weight? Give reasons.  
 
4. How do cathode rays differ from anode rays?  (2) 
 
5. Why do we get a crunchy and granular feeling when we chew pears? (2) 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section C 
 
6. Name the following: (3) 
(a) Cell organelle which synthesises proteins. 
(b) Type of plastid which stores food. 
(c) Site for ribosome formation. 
 
7. Write the most striking feature of the following phyla: (3) 
(a) Arthropoda 
(b) Annelida 
(c) Porifera  
OR 
 How are amphibians different from reptiles? List any three points of differences. 
 
8. Two forces F1 and F2  act on an object as shown. (3) 
 
 
 
(i) What is the net force acting on the object? 
(ii) What is the direction of the net force acting on the object? 
(iii) If the mass of the object is 10 kg, then what will be the acceleration produced in it? 
 
9. Explain why the Tyndall effect can be observed when light passes through a canopy of a 
dense forest. (3) 
 
10. Explain the advantages and disadvantages of mixed cropping. (3) 
 
11. Whales and fish resemble each other and both swim in water. Yet, why are whales not 
grouped with fish? (3) 
   
12. Calculate the number of atoms in 125 g of calcium and 130 g of iron. Which one has more 
number of atoms and how much is the difference?  (3)      
(Given atomic mass of calcium = 40 ?, iron = 56 ?)   
OR 
In a reaction, 5.6 g of sodium carbonate reacted with 7 g of ethanoic acid. The products 
were 2.8 g of carbon dioxide, 0.7 g of water and some sodium ethanoate. What is the 
expected weight of sodium ethanoate?  
  
Page 3


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
CBSE 
Class IX Science 
Sample Paper - 2 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be 
answered in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be 
answered in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name the bacterium responsible for denitrification in nature. (1) 
 
2. Which method is the most effective for destroying insects in stored grains—spraying or 
fumigation?  (1) 
 
Section B 
 
3. Explain any two factors affecting the value of g. (2) 
OR 
 Can a body have mass but no weight? Give reasons.  
 
4. How do cathode rays differ from anode rays?  (2) 
 
5. Why do we get a crunchy and granular feeling when we chew pears? (2) 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section C 
 
6. Name the following: (3) 
(a) Cell organelle which synthesises proteins. 
(b) Type of plastid which stores food. 
(c) Site for ribosome formation. 
 
7. Write the most striking feature of the following phyla: (3) 
(a) Arthropoda 
(b) Annelida 
(c) Porifera  
OR 
 How are amphibians different from reptiles? List any three points of differences. 
 
8. Two forces F1 and F2  act on an object as shown. (3) 
 
 
 
(i) What is the net force acting on the object? 
(ii) What is the direction of the net force acting on the object? 
(iii) If the mass of the object is 10 kg, then what will be the acceleration produced in it? 
 
9. Explain why the Tyndall effect can be observed when light passes through a canopy of a 
dense forest. (3) 
 
10. Explain the advantages and disadvantages of mixed cropping. (3) 
 
11. Whales and fish resemble each other and both swim in water. Yet, why are whales not 
grouped with fish? (3) 
   
12. Calculate the number of atoms in 125 g of calcium and 130 g of iron. Which one has more 
number of atoms and how much is the difference?  (3)      
(Given atomic mass of calcium = 40 ?, iron = 56 ?)   
OR 
In a reaction, 5.6 g of sodium carbonate reacted with 7 g of ethanoic acid. The products 
were 2.8 g of carbon dioxide, 0.7 g of water and some sodium ethanoate. What is the 
expected weight of sodium ethanoate?  
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
13. A man gets into a boat floating in water. (3) 
(i) What happens to the boat? 
(ii) What happens to the weight of water displaced by the submerged part of the boat? 
(iii) Does the buoyant force acting on the boat increase or decrease? Justify your answer. 
 
14. Rohini’s mother squeezes water from wet clothes in the spinner of the washing machine 
and then uses this water to clean the floor.  (3) 
(a) Write the principle of the technique used in the above process.  
(b) Write another application of this technique.  
(c) What value do you learn from Rohini’s mother?  
 
15. An object of mass 20 kg is dropped from a height ‘h’ metres as shown in the tables. 
(g = 10 m/s
2
) (3) 
Table A 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 80 
 
Table B 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 40 
 
Which of the above tables has wrong data in terms of the law of conservation of energy of 
an object falling from height ‘h’ metres? 
OR 
 A ball thrown vertically upwards returns to the thrower after 6 s. Find  
(a) The velocity with which it was thrown up. 
(b) The maximum height it reaches. 
Its position after 4 s. 
 
 
 
 
 
 
Page 4


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
CBSE 
Class IX Science 
Sample Paper - 2 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be 
answered in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be 
answered in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name the bacterium responsible for denitrification in nature. (1) 
 
2. Which method is the most effective for destroying insects in stored grains—spraying or 
fumigation?  (1) 
 
Section B 
 
3. Explain any two factors affecting the value of g. (2) 
OR 
 Can a body have mass but no weight? Give reasons.  
 
4. How do cathode rays differ from anode rays?  (2) 
 
5. Why do we get a crunchy and granular feeling when we chew pears? (2) 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section C 
 
6. Name the following: (3) 
(a) Cell organelle which synthesises proteins. 
(b) Type of plastid which stores food. 
(c) Site for ribosome formation. 
 
7. Write the most striking feature of the following phyla: (3) 
(a) Arthropoda 
(b) Annelida 
(c) Porifera  
OR 
 How are amphibians different from reptiles? List any three points of differences. 
 
8. Two forces F1 and F2  act on an object as shown. (3) 
 
 
 
(i) What is the net force acting on the object? 
(ii) What is the direction of the net force acting on the object? 
(iii) If the mass of the object is 10 kg, then what will be the acceleration produced in it? 
 
9. Explain why the Tyndall effect can be observed when light passes through a canopy of a 
dense forest. (3) 
 
10. Explain the advantages and disadvantages of mixed cropping. (3) 
 
11. Whales and fish resemble each other and both swim in water. Yet, why are whales not 
grouped with fish? (3) 
   
12. Calculate the number of atoms in 125 g of calcium and 130 g of iron. Which one has more 
number of atoms and how much is the difference?  (3)      
(Given atomic mass of calcium = 40 ?, iron = 56 ?)   
OR 
In a reaction, 5.6 g of sodium carbonate reacted with 7 g of ethanoic acid. The products 
were 2.8 g of carbon dioxide, 0.7 g of water and some sodium ethanoate. What is the 
expected weight of sodium ethanoate?  
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
13. A man gets into a boat floating in water. (3) 
(i) What happens to the boat? 
(ii) What happens to the weight of water displaced by the submerged part of the boat? 
(iii) Does the buoyant force acting on the boat increase or decrease? Justify your answer. 
 
14. Rohini’s mother squeezes water from wet clothes in the spinner of the washing machine 
and then uses this water to clean the floor.  (3) 
(a) Write the principle of the technique used in the above process.  
(b) Write another application of this technique.  
(c) What value do you learn from Rohini’s mother?  
 
15. An object of mass 20 kg is dropped from a height ‘h’ metres as shown in the tables. 
(g = 10 m/s
2
) (3) 
Table A 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 80 
 
Table B 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 40 
 
Which of the above tables has wrong data in terms of the law of conservation of energy of 
an object falling from height ‘h’ metres? 
OR 
 A ball thrown vertically upwards returns to the thrower after 6 s. Find  
(a) The velocity with which it was thrown up. 
(b) The maximum height it reaches. 
Its position after 4 s. 
 
 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section D 
 
16.    (5) 
(a) Mention the postulates of Bohr’s theory. 
(b) What are the failures of Thomson’s atomic model?  
OR 
(a) Why do 
35
17
Cl and 
37
17
Cl have the same chemical properties? In what respect do these 
atom differ? 
(b) Explain: Actual atomic mass is greater than mass number. 
 
17.  (5) 
(a) With the help of a neat and labelled diagram show the cycling of carbon in nature. 
(b) What are the two ways in which carbon dioxide is fixed in the environment? 
 
18.  (5) 
(i) A box is pulled across a floor by applying a force of 50 N at an angle of 60 ? above the 
horizontal. How much work is done by applying force in pulling the box to a distance of 
6 m?  
(ii) Two spheres of the same size but of different materials, rubber and iron, are kept on 
the smooth floor of a moving train. The driver suddenly applies brakes and the train 
stops. Will the spheres start rolling? If so, in which direction? Will they move with the 
same speed? Give reasons for your answer. 
 
19.  (5) 
(i) What is retardation? Write its formula. Give an example where it acts on a body.  
(ii) A train starting from rest attained a velocity of 30 m/s in 30 minutes. What is its 
acceleration? 
(iii) What is the distance travelled during this time?  
OR 
A train travels the first 10 km at a uniform speed of 25 km/h; the next 70 km at a uniform 
speed of 35 km/h and the final 20 km at a uniform speed of 20 km/h. What is the average 
speed attained by the train over the entire journey?     
 
  
Page 5


  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
CBSE 
Class IX Science 
Sample Paper - 2 
Time: 3 hrs  Total Marks: 80 
 
General Instructions: 
? The question paper comprises five sections – A, B, C, D and E. You are to attempt all the 
sections. 
? All questions are compulsory. 
? Internal choice is given in sections B, C, D and E. 
? Question numbers 1 and 2 in Section A are one mark questions. They are to be 
answered in one word or in one sentence. 
? Question numbers 3 to 5 in Section B are two marks questions. These are to be 
answered in about 30 words each. 
? Question numbers 6 to 15 in Section C are three marks questions. These are to be 
answered in about 50 words each. 
? Question numbers 16 to 21 in Section D are five marks questions. These are to be 
answered in about 70 words each. 
? Question numbers 22 to 27 in Section E are based on practical skills. Each question is a 
two marks question. These are to be answered in brief. 
 
Section A 
 
1. Name the bacterium responsible for denitrification in nature. (1) 
 
2. Which method is the most effective for destroying insects in stored grains—spraying or 
fumigation?  (1) 
 
Section B 
 
3. Explain any two factors affecting the value of g. (2) 
OR 
 Can a body have mass but no weight? Give reasons.  
 
4. How do cathode rays differ from anode rays?  (2) 
 
5. Why do we get a crunchy and granular feeling when we chew pears? (2) 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section C 
 
6. Name the following: (3) 
(a) Cell organelle which synthesises proteins. 
(b) Type of plastid which stores food. 
(c) Site for ribosome formation. 
 
7. Write the most striking feature of the following phyla: (3) 
(a) Arthropoda 
(b) Annelida 
(c) Porifera  
OR 
 How are amphibians different from reptiles? List any three points of differences. 
 
8. Two forces F1 and F2  act on an object as shown. (3) 
 
 
 
(i) What is the net force acting on the object? 
(ii) What is the direction of the net force acting on the object? 
(iii) If the mass of the object is 10 kg, then what will be the acceleration produced in it? 
 
9. Explain why the Tyndall effect can be observed when light passes through a canopy of a 
dense forest. (3) 
 
10. Explain the advantages and disadvantages of mixed cropping. (3) 
 
11. Whales and fish resemble each other and both swim in water. Yet, why are whales not 
grouped with fish? (3) 
   
12. Calculate the number of atoms in 125 g of calcium and 130 g of iron. Which one has more 
number of atoms and how much is the difference?  (3)      
(Given atomic mass of calcium = 40 ?, iron = 56 ?)   
OR 
In a reaction, 5.6 g of sodium carbonate reacted with 7 g of ethanoic acid. The products 
were 2.8 g of carbon dioxide, 0.7 g of water and some sodium ethanoate. What is the 
expected weight of sodium ethanoate?  
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
13. A man gets into a boat floating in water. (3) 
(i) What happens to the boat? 
(ii) What happens to the weight of water displaced by the submerged part of the boat? 
(iii) Does the buoyant force acting on the boat increase or decrease? Justify your answer. 
 
14. Rohini’s mother squeezes water from wet clothes in the spinner of the washing machine 
and then uses this water to clean the floor.  (3) 
(a) Write the principle of the technique used in the above process.  
(b) Write another application of this technique.  
(c) What value do you learn from Rohini’s mother?  
 
15. An object of mass 20 kg is dropped from a height ‘h’ metres as shown in the tables. 
(g = 10 m/s
2
) (3) 
Table A 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 80 
 
Table B 
Height from which an 
object is dropped 
‘h’ (m) 
Velocity of an object falling from 
the height 
‘v
2
’ (m/s
2
) 
10 0 
2 40 
 
Which of the above tables has wrong data in terms of the law of conservation of energy of 
an object falling from height ‘h’ metres? 
OR 
 A ball thrown vertically upwards returns to the thrower after 6 s. Find  
(a) The velocity with which it was thrown up. 
(b) The maximum height it reaches. 
Its position after 4 s. 
 
 
 
 
 
 
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
Section D 
 
16.    (5) 
(a) Mention the postulates of Bohr’s theory. 
(b) What are the failures of Thomson’s atomic model?  
OR 
(a) Why do 
35
17
Cl and 
37
17
Cl have the same chemical properties? In what respect do these 
atom differ? 
(b) Explain: Actual atomic mass is greater than mass number. 
 
17.  (5) 
(a) With the help of a neat and labelled diagram show the cycling of carbon in nature. 
(b) What are the two ways in which carbon dioxide is fixed in the environment? 
 
18.  (5) 
(i) A box is pulled across a floor by applying a force of 50 N at an angle of 60 ? above the 
horizontal. How much work is done by applying force in pulling the box to a distance of 
6 m?  
(ii) Two spheres of the same size but of different materials, rubber and iron, are kept on 
the smooth floor of a moving train. The driver suddenly applies brakes and the train 
stops. Will the spheres start rolling? If so, in which direction? Will they move with the 
same speed? Give reasons for your answer. 
 
19.  (5) 
(i) What is retardation? Write its formula. Give an example where it acts on a body.  
(ii) A train starting from rest attained a velocity of 30 m/s in 30 minutes. What is its 
acceleration? 
(iii) What is the distance travelled during this time?  
OR 
A train travels the first 10 km at a uniform speed of 25 km/h; the next 70 km at a uniform 
speed of 35 km/h and the final 20 km at a uniform speed of 20 km/h. What is the average 
speed attained by the train over the entire journey?     
 
  
  
 
CBSE IX  |  SCIENCE 
Sample Paper – 2 
 
             
20. 100 ml of water at room temperature of 25°C is taken in a beaker and a little of solid S is 
dissolved in it by stirring to obtain a solution X. More of solid S is added to the solution 
with constant stirring while keeping the temperature of the solution constant at 30°C. 
After some time, it is observed that no more solid dissolves in water, and at the same time, 
some solid is also left undissolved at the bottom of the beaker. The contents of the beaker 
are filtered through a filter paper to obtain solution Y in the form of a filtrate.  (5) 
(a) What is a solution like X called? 
(b) What is a solution like Y called? 
(c) What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the 
beaker in crushed ice? Why? 
(d) What term is used to denote the solid dissolved in 100 grams of water in a solution like 
Y? 
 
21. (a) It was diagnosed that Kiran has hepatitis.  (5) 
(i) Which organ of Kiran’s body is affected? 
(ii) How are antibiotics effective in the treatment of some diseases? 
(iii) Will they help in curing Kiran’s disease? Why? 
(b) ‘Prevention of a disease is more desirable than its treatment’. Justify this statement. 
OR 
(a) What is coelom? State its significance. 
(b)Pick out the organisms which have a pseudocoelom from the following: earthworm, 
pinworm, tapeworm and roundworm. 
(c) What is peculiar about the coelom of Arthropods? What is such a condition called? 
Explain. 
(d)To which phylum of Animalia do octopus, pila, chiton and unio belong? Comment on 
their coelom. 
 
Section E 
 
22. A diagram of earthworm is shown below.  (2) 
 
 
(a) To which phylum does earthworm belong? 
(b) Which feature needs to be labelled for placing the earthworm in its phylum?