Q.1. Which of the below processes is/are example of chemical change?
I. Photosynthesis.
II. Dissolving sugar into water.
III. Burning of coal.
IV. Digestion of food.
V. Breaking down of ozone to oxygen
A. Only II.
B. Only I ,III and IV.
C. Only I, III, IV and V.
D. All of the above.
E. None of the above.
Q.2. When carbon dioxide is passed through lime water, it turns milky due to the formation of _____.
A. Sodium Hydrogen Carbonate.
B. Calcium Carbonate.
C. Calcium Hydroxide.
D. Ammonium carbonate.
Q.3. Changes in which new substances are formed are called _______ changes.
A. Physical.
B. Chemical.
C. Reversible.
D. Irreversible.
Q.4. The chemical name of baking soda is _______.
A. Sodium Hydrogen Carbonate.
B. Calcium Carbonate.
C. Calcium Hydroxide.
D. Ammonium carbonate.
I. Photosynthesis.
II. Dissolving sugar into water.
III. Burning of coal.
IV. Digestion of food.
V. Breaking down of ozone to oxygen
A. Only II.
B. Only I ,III and IV.
C. Only I, III, IV and V.
D. All of the above.
E. None of the above.
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C. Only I, III ,IV and V.
Q.2. When carbon dioxide is passed through lime water, it turns milky due to the formation of _____.
A. Sodium Hydrogen Carbonate.
B. Calcium Carbonate.
C. Calcium Hydroxide.
D. Ammonium carbonate.
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B. Calcium Carbonate.
Q.3. Changes in which new substances are formed are called _______ changes.
A. Physical.
B. Chemical.
C. Reversible.
D. Irreversible.
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B. Chemical.
Q.4. The chemical name of baking soda is _______.
A. Sodium Hydrogen Carbonate.
B. Calcium Carbonate.
C. Calcium Hydroxide.
D. Ammonium carbonate.
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A. Sodium Hydrogen Carbonate.
Q.5. The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas (Change – A) then it burns (Change – B). The following statements pertain to these changes. Choose the correct one.
1. Process – A is a chemical change.
2. Process – B is a chemical change.
3. Both processes A and B are chemical changes.
4. None of these processes is a chemical change.
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2. Process – B is a chemical change.
Q.6. Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
Q.11. Which of the below statement is correct?
A. Burning of any substance is a physical change.
B. Burning of any substance is a chemical change.
C. Burning of a substance is neither a chemical change nor a physical change.
D. Burning of a substance can either be a chemical change or a physical change, only one at a time.
[CTET]
Q.12. Read the following example from daily life and select the appropriate option:
I. When food gets spoiled, it produces a foul smell.
II. A slice of apple acquires brown colour when kept out for some time.
III. When an ant bites, calamine is used to ease the irritation on skin.
A. I and II represent chemical changes.
B. All are chemical changes.
C. II is a physical change.
D. I and II are physical change
[CTET]
Q.13. When candle burns:
A. It's size decreases.
B. there is melting of wax.
C. flame and soot can be seen.
D. melted wax also solidies.
From the above observations, which one of the following is correct?
1. A is a physical change and others are chemical changes.
2. C is a chemical change and others are physical change.
3. A and B are physical change and c & d are chemical change.
4. A, B and C are physical change.
1. Process – A is a chemical change.
2. Process – B is a chemical change.
3. Both processes A and B are chemical changes.
4. None of these processes is a chemical change.
Q.7. Two methods by which rusting of iron can be prevented are _________ and _________.
A. Painting and Galvanisation.
B. Crystallisation and Galvanisation.
C. Painting and Cleaning.
D. Galvanisation and Cleaning.
Q.8. Which of the below change(s) takes place after burning a candle?
A. Physical Change.
B. Chemical Change.
C. Both of the above.
D. None of the above.
Q.9. Rusting of iron is faster in _____ areas than in _____ areas.
A. Desert, Coastal
B. Coastal,Desert.
C. Larger, small
D. Smaller, Large
Q.10. The reaction between copper sulphate solution and iron result in a green colour _______ solution and a new substance ______ is formed.
A. Copper sulphate, Iron oxide.
B. Iron sulphate, copper.
C. Iron sulphate, copper oxide.
D. Copper sulphate, Iron Hydroxide.
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3. Both processes A and B are chemical changes.
Q.7. Two methods by which rusting of iron can be prevented are _________ and _________.
A. Painting and Galvanisation.
B. Crystallisation and Galvanisation.
C. Painting and Cleaning.
D. Galvanisation and Cleaning.
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A. Painting and Galvanisation.
Q.8. Which of the below change(s) takes place after burning a candle?
A. Physical Change.
B. Chemical Change.
C. Both of the above.
D. None of the above.
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C. Both of the above.
Q.9. Rusting of iron is faster in _____ areas than in _____ areas.
A. Desert, Coastal
B. Coastal,Desert.
C. Larger, small
D. Smaller, Large
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B. Coastal,Desert.
Q.10. The reaction between copper sulphate solution and iron result in a green colour _______ solution and a new substance ______ is formed.
A. Copper sulphate, Iron oxide.
B. Iron sulphate, copper.
C. Iron sulphate, copper oxide.
D. Copper sulphate, Iron Hydroxide.
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B. Iron sulphate, copper.
Q.11. Which of the below statement is correct?
A. Burning of any substance is a physical change.
B. Burning of any substance is a chemical change.
C. Burning of a substance is neither a chemical change nor a physical change.
D. Burning of a substance can either be a chemical change or a physical change, only one at a time.
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B. Burning of any substance is a chemical change.
[CTET]
Q.12. Read the following example from daily life and select the appropriate option:
I. When food gets spoiled, it produces a foul smell.
II. A slice of apple acquires brown colour when kept out for some time.
III. When an ant bites, calamine is used to ease the irritation on skin.
A. I and II represent chemical changes.
B. All are chemical changes.
C. II is a physical change.
D. I and II are physical change
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B. All are chemical changes.
[CTET]
Q.13. When candle burns:
A. It's size decreases.
B. there is melting of wax.
C. flame and soot can be seen.
D. melted wax also solidies.
From the above observations, which one of the following is correct?
1. A is a physical change and others are chemical changes.
2. C is a chemical change and others are physical change.
3. A and B are physical change and c & d are chemical change.
4. A, B and C are physical change.
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2. C is a chemical change and others are physical change.
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