Science Past Year Paper SA-1 - 2016, Class 9, CBSE Class 9 Notes | EduRev

Past Year Papers For Class 9

Class 9 : Science Past Year Paper SA-1 - 2016, Class 9, CBSE Class 9 Notes | EduRev

 Page 1


Summative Assessment I – 2016-2017 
Class – IX 
Science 
Time allowed: 3 hours Max Marks: 90 
General Instructions: 
I. All questions are compulsory. 
II. Question nos. 1 to 3 in section A carry 1 mar each,
III. Question nos. 4 to 6 carry 2 marks each,
IV. Question nos. 7 to 18 carry 3 marks each,
V. Question nos. 19 to 24 carry 5 marks each,
VI. Question nos. 25 to 33 are multiple choice questions based on practical skills and each
question carries one mark. You must indicate the specific answer along with the option
for multiple choice questions.
IX. Question nos. 34 to 36 are explanatory based on practical skills and carry two marks
each.
X. The question paper also contains a value based question.
Section A 
Q1. What is the physical state of water at zero degree Celsius? 
Q2. What are the functional segments of DNA called? 
Q3. What does the slope of distance time graph represent? 
Q4. Classify the following as physical or chemical changes; 
a. Rusting of an iron nail
b. Freezing of water
c. Growth of a plant
d. Burning of kerosene in a lantern
Q5. Which cell organelle is called the suicidal bags of the cell. Why? 
Q6. How does the force of gravitation between two objects change when the distance 
between them is reduced to half? Explain. 
Q7. Distinguish between the following- (one point each) 
a) Rabi and Kharif crops
b) Manure and Fertilizer
c) Intercropping and Crop Rotation
Q8. Complete the analogy- 
a) Colourless plastids :------------- ::---------------- chloroplast 
b) ------------------: Bacteria :: Multicellular:----------------
c) Detoxification of drugs :------------------- :: -----------------------------:Mitochondria
Page 2


Summative Assessment I – 2016-2017 
Class – IX 
Science 
Time allowed: 3 hours Max Marks: 90 
General Instructions: 
I. All questions are compulsory. 
II. Question nos. 1 to 3 in section A carry 1 mar each,
III. Question nos. 4 to 6 carry 2 marks each,
IV. Question nos. 7 to 18 carry 3 marks each,
V. Question nos. 19 to 24 carry 5 marks each,
VI. Question nos. 25 to 33 are multiple choice questions based on practical skills and each
question carries one mark. You must indicate the specific answer along with the option
for multiple choice questions.
IX. Question nos. 34 to 36 are explanatory based on practical skills and carry two marks
each.
X. The question paper also contains a value based question.
Section A 
Q1. What is the physical state of water at zero degree Celsius? 
Q2. What are the functional segments of DNA called? 
Q3. What does the slope of distance time graph represent? 
Q4. Classify the following as physical or chemical changes; 
a. Rusting of an iron nail
b. Freezing of water
c. Growth of a plant
d. Burning of kerosene in a lantern
Q5. Which cell organelle is called the suicidal bags of the cell. Why? 
Q6. How does the force of gravitation between two objects change when the distance 
between them is reduced to half? Explain. 
Q7. Distinguish between the following- (one point each) 
a) Rabi and Kharif crops
b) Manure and Fertilizer
c) Intercropping and Crop Rotation
Q8. Complete the analogy- 
a) Colourless plastids :------------- ::---------------- chloroplast 
b) ------------------: Bacteria :: Multicellular:----------------
c) Detoxification of drugs :------------------- :: -----------------------------:Mitochondria
Q9. Carbon dioxide gas was taken in a closed cylinder and compressed by applying 
pressure: 
a. Which state of matter will be obtained after completion of the process
b. Name the above-mentioned process
c. What is the common name of the product obtained in the above process
Q10. a) State the differences between dispersed phase and dispersion medium of a colloid 
b) What will happen when a beam of light is passed through
i) Milk
ii) Sugar solution
Q11. Give reasons for the following- 
a) Bones are hard and inflexible 
b) Animals of colder region and fishes of cold water have thick layer of fat.
c) It is difficult to pull out the husk of coconut.
Q12. a) Calculate the mass of Potassium Sulphate required to prepare its 10% solution in 100 
grams of water. 
b) Why is the tincture of Iodine called as a non aqueous solution?
Q13. Shiva was thinking how messages are transmitted in our body. He came to the 
conclusion that there are specific tissues in our brains that helps in performing this 
function. Identify this tissue. Draw its well labeled diagram (any 2 labels) 
Q14. Derive the second equation of motion using the graphical method. 
Q15. Ramesh and Suresh were very excited as it was the first day of the cricket camp, 
organized for selection of school cricket team. The coach started the selection process 
with a fielding test. The players were asked to go through the catching drill. While 
Ramesh dropped most of the catches Suresh was able to take all the catches. In the end 
coach explained that Suresh’s technique was perfect as he pushed his hand backward 
while taking a catch, that helped him to take the catches easily. 
While returning home Suresh explained that he remembered in one of science class the 
teacher has explained that if more time will be taken then less force is required to stop a 
body. This has helped him to apply the same theory in sport. After hearing this, Ramesh 
was really impressed with Suresh’s approach. 
(a) What is the scientific phenomenon used in catching the ball? 
(b) Give any other application of this phenomenon from our daily life? 
(c) What are the values shown by Suresh? 
Q16. (a) State the type of motion shown by a freely falling body. 
(b) When a stone is thrown vertically upwards, its velocity is continuously decreased. 
Why? 
Page 3


Summative Assessment I – 2016-2017 
Class – IX 
Science 
Time allowed: 3 hours Max Marks: 90 
General Instructions: 
I. All questions are compulsory. 
II. Question nos. 1 to 3 in section A carry 1 mar each,
III. Question nos. 4 to 6 carry 2 marks each,
IV. Question nos. 7 to 18 carry 3 marks each,
V. Question nos. 19 to 24 carry 5 marks each,
VI. Question nos. 25 to 33 are multiple choice questions based on practical skills and each
question carries one mark. You must indicate the specific answer along with the option
for multiple choice questions.
IX. Question nos. 34 to 36 are explanatory based on practical skills and carry two marks
each.
X. The question paper also contains a value based question.
Section A 
Q1. What is the physical state of water at zero degree Celsius? 
Q2. What are the functional segments of DNA called? 
Q3. What does the slope of distance time graph represent? 
Q4. Classify the following as physical or chemical changes; 
a. Rusting of an iron nail
b. Freezing of water
c. Growth of a plant
d. Burning of kerosene in a lantern
Q5. Which cell organelle is called the suicidal bags of the cell. Why? 
Q6. How does the force of gravitation between two objects change when the distance 
between them is reduced to half? Explain. 
Q7. Distinguish between the following- (one point each) 
a) Rabi and Kharif crops
b) Manure and Fertilizer
c) Intercropping and Crop Rotation
Q8. Complete the analogy- 
a) Colourless plastids :------------- ::---------------- chloroplast 
b) ------------------: Bacteria :: Multicellular:----------------
c) Detoxification of drugs :------------------- :: -----------------------------:Mitochondria
Q9. Carbon dioxide gas was taken in a closed cylinder and compressed by applying 
pressure: 
a. Which state of matter will be obtained after completion of the process
b. Name the above-mentioned process
c. What is the common name of the product obtained in the above process
Q10. a) State the differences between dispersed phase and dispersion medium of a colloid 
b) What will happen when a beam of light is passed through
i) Milk
ii) Sugar solution
Q11. Give reasons for the following- 
a) Bones are hard and inflexible 
b) Animals of colder region and fishes of cold water have thick layer of fat.
c) It is difficult to pull out the husk of coconut.
Q12. a) Calculate the mass of Potassium Sulphate required to prepare its 10% solution in 100 
grams of water. 
b) Why is the tincture of Iodine called as a non aqueous solution?
Q13. Shiva was thinking how messages are transmitted in our body. He came to the 
conclusion that there are specific tissues in our brains that helps in performing this 
function. Identify this tissue. Draw its well labeled diagram (any 2 labels) 
Q14. Derive the second equation of motion using the graphical method. 
Q15. Ramesh and Suresh were very excited as it was the first day of the cricket camp, 
organized for selection of school cricket team. The coach started the selection process 
with a fielding test. The players were asked to go through the catching drill. While 
Ramesh dropped most of the catches Suresh was able to take all the catches. In the end 
coach explained that Suresh’s technique was perfect as he pushed his hand backward 
while taking a catch, that helped him to take the catches easily. 
While returning home Suresh explained that he remembered in one of science class the 
teacher has explained that if more time will be taken then less force is required to stop a 
body. This has helped him to apply the same theory in sport. After hearing this, Ramesh 
was really impressed with Suresh’s approach. 
(a) What is the scientific phenomenon used in catching the ball? 
(b) Give any other application of this phenomenon from our daily life? 
(c) What are the values shown by Suresh? 
Q16. (a) State the type of motion shown by a freely falling body. 
(b) When a stone is thrown vertically upwards, its velocity is continuously decreased. 
Why? 
(c) Give an example of motion in which average velocity is zero but the average speed is 
not zero. 
Q17. (a) What is the weight of one Kg mass on the surface of earth? 
(b) Differentiate between mass & weight (2 points) 
Q18. (a) A stone is thrown vertically upward, it reached the maximum height in 3 seconds. 
Calculate the initial velocity of the stone. (g = 10m/sec
2
) 
(b) State the universal Law of Gravitation. 
Q19. Account for the following- 
a) Evaporation causes cooling 
b) We prefer to wear cotton clothes than nylon during summers
c) Gases are more compressible than solids or liquids
d) Naphthalene balls disappear with time without leaving any solid
e) Ice is cooler than Ice cold water at the same temperature
Q20. a) Rahul and Rachna were practicing Apiculture in their farm. They decided to select an 
Italian bee variety A. mellifera for hybridisation. State three reasons for selection this 
variety. 
b) “If we excessively use pesticides to safeguard the crop, it may cause long term
damage to the mankind”. Is this statement correct. Justify your answer by giving 2 
points. 
Q21. a) With the help of a flow chart explain the method of separation of various gases 
present in air. Also mention the boiling point at which the gases separate out. 
b) Suggest a method for separation of the following mixtures- 
i) Mustard oil and water 
ii) Butter from cream
iii) Drugs from blood
iv) Sodium chloride from Ammonium chloride
v) Alcohol and water
vi) Sugar from its solution
Q22. (a) Usha swims in a 90m long pool. She covers 180m in one minute by swimming from 
one end to another and back along the same path. Find the average speed and average 
velocity of Usha. 
(b) Draw velocity-time graphs for the following cases- 
(1) When the object is in uniform motion 
(2) When the object is thrown vertically upwards 
Q23. (a) Give reasons 
(i) A person sitting in a bus gets a backward jerk when the bus starts suddenly. 
(ii) A gun recoils on firing. 
Page 4


Summative Assessment I – 2016-2017 
Class – IX 
Science 
Time allowed: 3 hours Max Marks: 90 
General Instructions: 
I. All questions are compulsory. 
II. Question nos. 1 to 3 in section A carry 1 mar each,
III. Question nos. 4 to 6 carry 2 marks each,
IV. Question nos. 7 to 18 carry 3 marks each,
V. Question nos. 19 to 24 carry 5 marks each,
VI. Question nos. 25 to 33 are multiple choice questions based on practical skills and each
question carries one mark. You must indicate the specific answer along with the option
for multiple choice questions.
IX. Question nos. 34 to 36 are explanatory based on practical skills and carry two marks
each.
X. The question paper also contains a value based question.
Section A 
Q1. What is the physical state of water at zero degree Celsius? 
Q2. What are the functional segments of DNA called? 
Q3. What does the slope of distance time graph represent? 
Q4. Classify the following as physical or chemical changes; 
a. Rusting of an iron nail
b. Freezing of water
c. Growth of a plant
d. Burning of kerosene in a lantern
Q5. Which cell organelle is called the suicidal bags of the cell. Why? 
Q6. How does the force of gravitation between two objects change when the distance 
between them is reduced to half? Explain. 
Q7. Distinguish between the following- (one point each) 
a) Rabi and Kharif crops
b) Manure and Fertilizer
c) Intercropping and Crop Rotation
Q8. Complete the analogy- 
a) Colourless plastids :------------- ::---------------- chloroplast 
b) ------------------: Bacteria :: Multicellular:----------------
c) Detoxification of drugs :------------------- :: -----------------------------:Mitochondria
Q9. Carbon dioxide gas was taken in a closed cylinder and compressed by applying 
pressure: 
a. Which state of matter will be obtained after completion of the process
b. Name the above-mentioned process
c. What is the common name of the product obtained in the above process
Q10. a) State the differences between dispersed phase and dispersion medium of a colloid 
b) What will happen when a beam of light is passed through
i) Milk
ii) Sugar solution
Q11. Give reasons for the following- 
a) Bones are hard and inflexible 
b) Animals of colder region and fishes of cold water have thick layer of fat.
c) It is difficult to pull out the husk of coconut.
Q12. a) Calculate the mass of Potassium Sulphate required to prepare its 10% solution in 100 
grams of water. 
b) Why is the tincture of Iodine called as a non aqueous solution?
Q13. Shiva was thinking how messages are transmitted in our body. He came to the 
conclusion that there are specific tissues in our brains that helps in performing this 
function. Identify this tissue. Draw its well labeled diagram (any 2 labels) 
Q14. Derive the second equation of motion using the graphical method. 
Q15. Ramesh and Suresh were very excited as it was the first day of the cricket camp, 
organized for selection of school cricket team. The coach started the selection process 
with a fielding test. The players were asked to go through the catching drill. While 
Ramesh dropped most of the catches Suresh was able to take all the catches. In the end 
coach explained that Suresh’s technique was perfect as he pushed his hand backward 
while taking a catch, that helped him to take the catches easily. 
While returning home Suresh explained that he remembered in one of science class the 
teacher has explained that if more time will be taken then less force is required to stop a 
body. This has helped him to apply the same theory in sport. After hearing this, Ramesh 
was really impressed with Suresh’s approach. 
(a) What is the scientific phenomenon used in catching the ball? 
(b) Give any other application of this phenomenon from our daily life? 
(c) What are the values shown by Suresh? 
Q16. (a) State the type of motion shown by a freely falling body. 
(b) When a stone is thrown vertically upwards, its velocity is continuously decreased. 
Why? 
(c) Give an example of motion in which average velocity is zero but the average speed is 
not zero. 
Q17. (a) What is the weight of one Kg mass on the surface of earth? 
(b) Differentiate between mass & weight (2 points) 
Q18. (a) A stone is thrown vertically upward, it reached the maximum height in 3 seconds. 
Calculate the initial velocity of the stone. (g = 10m/sec
2
) 
(b) State the universal Law of Gravitation. 
Q19. Account for the following- 
a) Evaporation causes cooling 
b) We prefer to wear cotton clothes than nylon during summers
c) Gases are more compressible than solids or liquids
d) Naphthalene balls disappear with time without leaving any solid
e) Ice is cooler than Ice cold water at the same temperature
Q20. a) Rahul and Rachna were practicing Apiculture in their farm. They decided to select an 
Italian bee variety A. mellifera for hybridisation. State three reasons for selection this 
variety. 
b) “If we excessively use pesticides to safeguard the crop, it may cause long term
damage to the mankind”. Is this statement correct. Justify your answer by giving 2 
points. 
Q21. a) With the help of a flow chart explain the method of separation of various gases 
present in air. Also mention the boiling point at which the gases separate out. 
b) Suggest a method for separation of the following mixtures- 
i) Mustard oil and water 
ii) Butter from cream
iii) Drugs from blood
iv) Sodium chloride from Ammonium chloride
v) Alcohol and water
vi) Sugar from its solution
Q22. (a) Usha swims in a 90m long pool. She covers 180m in one minute by swimming from 
one end to another and back along the same path. Find the average speed and average 
velocity of Usha. 
(b) Draw velocity-time graphs for the following cases- 
(1) When the object is in uniform motion 
(2) When the object is thrown vertically upwards 
Q23. (a) Give reasons 
(i) A person sitting in a bus gets a backward jerk when the bus starts suddenly. 
(ii) A gun recoils on firing. 
(iii) Action and reaction are equal & opposite but even than they do not cancel each 
other. 
(b) Two solids made up of steel & wood are of the same shape and same volume. Which 
of the two have greater inertial & why? 
Q24. a) Give two advantages and one disadvantage of composite fish culture. 
b) Name one exotic and one indigenous variety of cattle.
Section B 
Q25. When iron is treated with copper sulphate solution which of the following observation 
is correct 
a) It is a chemical change and the solution acquires greenish colour
b) It is a chemical change and the solution acquires Reddish brown colour
c) It is a physical change and the solution acquires greenish colour
d) It is a physical change and the solution acquires light blue colour
Q26. A strip of magnesium metal is burnt in air. Which of the following statements in 
correct? 
a) Yellowish light is observed
b) Dazzling white light is observed
c) Magnesium starts melting
d) A black ash is formed
Q27. In the experiment to separate the components of a mixture of sand, common salt and 
ammonium chloride the component which will be removed by filtration is 
a) Sand
b) Common salt
c) Ammonium chloride
d) None of these
Q28. Aqueous solution of sodium Sulphate and Barium Chloride were mixed together. It was 
observed that: 
a) A white precipitate is formed
b) A colorless solution is formed
c) Yellow precipitate formed
d) No reaction takes place
Q29. The following substances are added to water in a beaker as shown. The mixture is 
stirred well. A true solution is found in the beaker- 
  
Page 5


Summative Assessment I – 2016-2017 
Class – IX 
Science 
Time allowed: 3 hours Max Marks: 90 
General Instructions: 
I. All questions are compulsory. 
II. Question nos. 1 to 3 in section A carry 1 mar each,
III. Question nos. 4 to 6 carry 2 marks each,
IV. Question nos. 7 to 18 carry 3 marks each,
V. Question nos. 19 to 24 carry 5 marks each,
VI. Question nos. 25 to 33 are multiple choice questions based on practical skills and each
question carries one mark. You must indicate the specific answer along with the option
for multiple choice questions.
IX. Question nos. 34 to 36 are explanatory based on practical skills and carry two marks
each.
X. The question paper also contains a value based question.
Section A 
Q1. What is the physical state of water at zero degree Celsius? 
Q2. What are the functional segments of DNA called? 
Q3. What does the slope of distance time graph represent? 
Q4. Classify the following as physical or chemical changes; 
a. Rusting of an iron nail
b. Freezing of water
c. Growth of a plant
d. Burning of kerosene in a lantern
Q5. Which cell organelle is called the suicidal bags of the cell. Why? 
Q6. How does the force of gravitation between two objects change when the distance 
between them is reduced to half? Explain. 
Q7. Distinguish between the following- (one point each) 
a) Rabi and Kharif crops
b) Manure and Fertilizer
c) Intercropping and Crop Rotation
Q8. Complete the analogy- 
a) Colourless plastids :------------- ::---------------- chloroplast 
b) ------------------: Bacteria :: Multicellular:----------------
c) Detoxification of drugs :------------------- :: -----------------------------:Mitochondria
Q9. Carbon dioxide gas was taken in a closed cylinder and compressed by applying 
pressure: 
a. Which state of matter will be obtained after completion of the process
b. Name the above-mentioned process
c. What is the common name of the product obtained in the above process
Q10. a) State the differences between dispersed phase and dispersion medium of a colloid 
b) What will happen when a beam of light is passed through
i) Milk
ii) Sugar solution
Q11. Give reasons for the following- 
a) Bones are hard and inflexible 
b) Animals of colder region and fishes of cold water have thick layer of fat.
c) It is difficult to pull out the husk of coconut.
Q12. a) Calculate the mass of Potassium Sulphate required to prepare its 10% solution in 100 
grams of water. 
b) Why is the tincture of Iodine called as a non aqueous solution?
Q13. Shiva was thinking how messages are transmitted in our body. He came to the 
conclusion that there are specific tissues in our brains that helps in performing this 
function. Identify this tissue. Draw its well labeled diagram (any 2 labels) 
Q14. Derive the second equation of motion using the graphical method. 
Q15. Ramesh and Suresh were very excited as it was the first day of the cricket camp, 
organized for selection of school cricket team. The coach started the selection process 
with a fielding test. The players were asked to go through the catching drill. While 
Ramesh dropped most of the catches Suresh was able to take all the catches. In the end 
coach explained that Suresh’s technique was perfect as he pushed his hand backward 
while taking a catch, that helped him to take the catches easily. 
While returning home Suresh explained that he remembered in one of science class the 
teacher has explained that if more time will be taken then less force is required to stop a 
body. This has helped him to apply the same theory in sport. After hearing this, Ramesh 
was really impressed with Suresh’s approach. 
(a) What is the scientific phenomenon used in catching the ball? 
(b) Give any other application of this phenomenon from our daily life? 
(c) What are the values shown by Suresh? 
Q16. (a) State the type of motion shown by a freely falling body. 
(b) When a stone is thrown vertically upwards, its velocity is continuously decreased. 
Why? 
(c) Give an example of motion in which average velocity is zero but the average speed is 
not zero. 
Q17. (a) What is the weight of one Kg mass on the surface of earth? 
(b) Differentiate between mass & weight (2 points) 
Q18. (a) A stone is thrown vertically upward, it reached the maximum height in 3 seconds. 
Calculate the initial velocity of the stone. (g = 10m/sec
2
) 
(b) State the universal Law of Gravitation. 
Q19. Account for the following- 
a) Evaporation causes cooling 
b) We prefer to wear cotton clothes than nylon during summers
c) Gases are more compressible than solids or liquids
d) Naphthalene balls disappear with time without leaving any solid
e) Ice is cooler than Ice cold water at the same temperature
Q20. a) Rahul and Rachna were practicing Apiculture in their farm. They decided to select an 
Italian bee variety A. mellifera for hybridisation. State three reasons for selection this 
variety. 
b) “If we excessively use pesticides to safeguard the crop, it may cause long term
damage to the mankind”. Is this statement correct. Justify your answer by giving 2 
points. 
Q21. a) With the help of a flow chart explain the method of separation of various gases 
present in air. Also mention the boiling point at which the gases separate out. 
b) Suggest a method for separation of the following mixtures- 
i) Mustard oil and water 
ii) Butter from cream
iii) Drugs from blood
iv) Sodium chloride from Ammonium chloride
v) Alcohol and water
vi) Sugar from its solution
Q22. (a) Usha swims in a 90m long pool. She covers 180m in one minute by swimming from 
one end to another and back along the same path. Find the average speed and average 
velocity of Usha. 
(b) Draw velocity-time graphs for the following cases- 
(1) When the object is in uniform motion 
(2) When the object is thrown vertically upwards 
Q23. (a) Give reasons 
(i) A person sitting in a bus gets a backward jerk when the bus starts suddenly. 
(ii) A gun recoils on firing. 
(iii) Action and reaction are equal & opposite but even than they do not cancel each 
other. 
(b) Two solids made up of steel & wood are of the same shape and same volume. Which 
of the two have greater inertial & why? 
Q24. a) Give two advantages and one disadvantage of composite fish culture. 
b) Name one exotic and one indigenous variety of cattle.
Section B 
Q25. When iron is treated with copper sulphate solution which of the following observation 
is correct 
a) It is a chemical change and the solution acquires greenish colour
b) It is a chemical change and the solution acquires Reddish brown colour
c) It is a physical change and the solution acquires greenish colour
d) It is a physical change and the solution acquires light blue colour
Q26. A strip of magnesium metal is burnt in air. Which of the following statements in 
correct? 
a) Yellowish light is observed
b) Dazzling white light is observed
c) Magnesium starts melting
d) A black ash is formed
Q27. In the experiment to separate the components of a mixture of sand, common salt and 
ammonium chloride the component which will be removed by filtration is 
a) Sand
b) Common salt
c) Ammonium chloride
d) None of these
Q28. Aqueous solution of sodium Sulphate and Barium Chloride were mixed together. It was 
observed that: 
a) A white precipitate is formed
b) A colorless solution is formed
c) Yellow precipitate formed
d) No reaction takes place
Q29. The following substances are added to water in a beaker as shown. The mixture is 
stirred well. A true solution is found in the beaker- 
  
a) I
b) II
c) III
d) IV
Q30. Substance X was added to a test tube containing water and grounded Arhar Dal to test 
the presence of metanil yellow. The colour of the solution changed to pink. Identify the 
compound X. 
a) Water
b) Sodium Hydroxide
c) Hydrochloric acid
d) Sodium carbonate
Q31. The stain used in mounting the onion peel is- 
a) Methylene blue 
b) Glycerine
c) Iodine
d) both a and b
Q32. Which of the following does not contain starch- 
a) Wheat 
b) Rice
c) Potatoes
d) Green vegetables
Q33. A student observed a permanent slide under microscope and reported that the cell have 
thin cell wall and a dense cytoplasm. It is: 
a) Parenchyma
b) Sclerenchyma
c) Striped muscle
d) Nerve cell
Q34. Give two reasons to support that Iron Sulphide is a compound and not a mixture. 
Q35. A girl was observing slide of muscle under the microscope She identifies the muscles as 
striated. What could be the basis of her identification? Write 2 points. 
Q36. Mohan was performing the experiment to establish relation between weight of a 
wooden block and minimum force required to just move it on a horizontal surface with 
the help of a spring balance. He took a spring balance of range 0-500gwt which has total 
100 divisions on its scale. What is its least count? 
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