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Chemical Changes and Properties, Quizzes of Chemistry

Chemistry

Various questions related to chemical changes and properties of substances. It discusses topics such as the changes observed when carbon dioxide is passed through lime water, the formation of iron sulphate when an iron nail is dropped into a copper sulphate solution, the process of galvanization to prevent rusting, the difference between physical and chemical changes, and the characteristics that define the chemical properties of a substance. A comprehensive understanding of these fundamental concepts in chemistry, which are essential for students studying topics related to chemical reactions, properties of materials, and the behavior of substances under different conditions.

Typology: Quizzes

2023/2024

Available from 09/19/2024

rajjatt-sabhrwal
rajjatt-sabhrwal 🇮🇳

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Q1. When carbon dioxide is passed through lime water, then lime water becomes.
1. Milky.
2. Shiney.
3. Silvery.
4. Golden yellow.
1 Mark
Ans: 1. Milky.
Q2. Metal that is made by mixing iron with carbon, nickel and manganese is called.
1. Stainless steel.
2. German silver.
3. Nichrome.
4. Eureka.
1 Mark
Ans: 1. Stainless steel.
1 MarkQ3. Blue colour of the copper sulphate soluon changes to Green colour when an iron nail is dropped into it due to
the formaon of:
1. Iron sulphate.
2. Copper chloride.
3. Copper iron sulphate.
4. Iron chloride.
Ans: 1. Iron sulphate.
Q4. Galvanisaon is a process used to prevent the rusng of which of the following?
1. Iron.
2. Zinc.
3. Aluminium.
4. Copper.
1 Mark
Ans: 1. Iron.
Q5. Which of the following is a physical change?
1. Rusng of Iron.
2. Heang of Iron.
3. Burning of Wood.
4. Ripening of a fruit.
1 Mark
Ans: 2. Heang of Iron.
Q6. Formaon of gas bubbles is ____________.
1. A physical change.
2. A physical property.
3. A chemical change.
4. A chemical property.
1 Mark
Ans: 3. A chemical change.
Q7. Brown colour of the apple aer cung is:
1. Physical change.
2. Chemical change.
3. No change.
4. Biological change.
1 Mark
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Download Chemical Changes and Properties and more Quizzes Chemistry in PDF only on Docsity!

Q1. When carbon dioxide is passed through lime water, then lime water becomes.

  1. Milky.
  2. Shiney.
  3. Silvery.
  4. Golden yellow.

1 Mark

Ans: 1. Milky.

Q2. Metal that is made by mixing iron with carbon, nickel and manganese is called.

  1. Stainless steel.
  2. German silver.
  3. Nichrome.
  4. Eureka.

1 Mark

Ans: 1. Stainless steel.

Q3. Blue colour of the copper sulphate soluon changes to Green colour when an iron nail is dropped into it due to 1 Mark the formaon of:

  1. Iron sulphate.
  2. Copper chloride.
  3. Copper iron sulphate.
  4. Iron chloride.

Ans: 1. Iron sulphate.

Q4. Galvanisaon is a process used to prevent the rusng of which of the following?

  1. Iron.
  2. Zinc.
  3. Aluminium.
  4. Copper.

1 Mark

Ans: 1. Iron.

Q5. Which of the following is a physical change?

  1. Rusng of Iron.
  2. Heang of Iron.
  3. Burning of Wood.
  4. Ripening of a fruit.

1 Mark

Ans: 2. Heang of Iron.

Q6. Formaon of gas bubbles is ____________.

  1. A physical change.
  2. A physical property.
  3. A chemical change.
  4. A chemical property.

1 Mark

Ans: 3. A chemical change.

Q7. Brown colour of the apple aer cung is:

  1. Physical change.
  2. Chemical change.
  3. No change.
  4. Biological change.

1 Mark

Ans: 2. Chemical change.

Q8. When carbon dioxide gas is passed through lime water, it turns lime water into __________.

  1. Milky.
  2. Blue.
  3. Silver.
  4. Golden.

1 Mark

Ans: 1. Milky.

Q9. A change in which a substance undergoes changes in its physical properes is called.

  1. Chemical change.
  2. physical change.
  3. No change.
  4. Biological change.

1 Mark

Ans: 2. physical change.

Q10. Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (Step I). On cooling, beauful blue coloured crystals got separated (Step II). Step I and Step II are:

  1. Physical and chemical changes respecvely.
  2. Chemical and physical changes respecvely.
  3. Both physical change.
  4. Both chemical change.

1 Mark

Ans: 3. Both physical change.

Q11. A man painted his main gate made up of iron, to:

  1. Prevent it from rusng.
  2. Protect it from the sun.
  3. Make it look beauful.
  4. Make it dust free. Which of the above statements is/are correct?
  5. (i) and (ii)
  6. (ii) and (iii)
  7. Only (ii)
  8. (i) and (iii)

1 Mark

Ans: 4. (i) and (iii) Explanaon: Iron gate does not need to be protected from sun. Paints cannot avoid dust. To prevent rusng of Iron Gate, we do paint on it. Painng makes it beauful.

Q12. Which of the following is a chemical change?

  1. Boiling of Water.
  2. Tearing of Newspaper.
  3. Cooking a vegetable.
  4. Freezing water into ice.

1 Mark

Ans: 3. Cooking a vegetable.

Q13. Turning milk into curd is a:

  1. Physical change.
  2. Physical property.
  3. Chemical change.
  4. Chemical property.

1 Mark

Ans: 3. Chemical change.

Q14. Which one of the following is a chemical change?

  1. Twinkling of stars.

1 Mark

  1. Change in temperature only.
  2. Evoluon of gas only.
  3. All of the these.

Ans: 4. All of the these. Explanaon: Chemical reacons may accompany change in colour, evoluon of heat and gas etc.

Q22. When Magnesium ribbon is burnt in candle flame it burns with.

  1. Brilliant red light.
  2. Brilliant yellow light.
  3. Brilliant white light.
  4. Brilliant Green light.

1 Mark

Ans: 3. Brilliant white light.

Q23. Which of the following are true when milk changes into curd?

  1. Its state is changed from liquid to semi-solid.
  2. It changes colour.
  3. It changes taste.
  4. The change cannot be reversed. Choose the correct opon.
  5. (i) and (ii).
  6. (ii) and (iii).
  7. (i), (iii) and (iv).
  8. (i) to (iv).

1 Mark

Ans: 3. (i), (iii) and (iv).

Q24. Magnesium hydroxide, obtained when Magnesium oxide is dissolved in water, is:

  1. Base.
  2. An acid.
  3. An indicator.
  4. A dissolving agent.

1 Mark

Ans: 1. Base.

Q25. Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

  1. It is more than 7m high.
  2. It weighs about 6000kg.
  3. It was built more than 1600 years ago.
  4. It has not rusted aer such a long period.

1 Mark

Ans: 4. It has not rusted aer such a long period.

Q26. Which of the following is not a physical property of a substance?

  1. Shape.
  2. Color.
  3. Density.
  4. Flammability.

1 Mark

Ans: 4. Flammability.

Q27. Which of the following is a chemical property of Aluminium?

  1. It corrodes with air.
  2. It is so and malleable.
  3. It melts at 660°C.
  4. Its density is 2.70g/ cm.

1 Mark

Ans: 1. It corrodes with air.

Q28. 1 Mark

3

Two drops of dilute sulphuric acid were added to lg of copper sulphate powder and then small amount of hot water was added to dissolve it (Step I). On cooling, beauful blue coloured eystals got separated (Step II). Step I and Step II are:

  1. Physical and chemical changes respecvely.
  2. Chemical and physical changes respecvely.
  3. Both physical change.
  4. Both chemical change.

Ans: 3. Both physical change. Explanaon: Step I and Step II are both physical change.

Q29. The process of obtaining Salt by the evaporaon of sea water is known as ___________.

  1. Crystallizaon.
  2. Sublimaon.
  3. Galvanizaon.
  4. Amalgamaon.

1 Mark

Ans: 1. Crystallizaon.

Q30. The process of deposing a layer of one metal over another metal surface to protect it from rusng is called.

  1. Galvanizaon.
  2. Crystallizaon.
  3. Amalgamang.
  4. Neutralizaon.

1 Mark

Ans: 1. Galvanizaon.

Q31. Ozone layer protects us from harmful.

  1. Ultraviolet radiaon.
  2. Infrared Radiaon.
  3. Visible Radiaon.
  4. Heat radiaon.

1 Mark

Ans: 1. Ultraviolet radiaon.

Q32. Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:

  1. Physical change that can be reversed.
  2. Chemical change that can be reversed.
  3. Physical change that cannot be reversed.
  4. Chemical change that cannot be reversed.

1 Mark

Ans: 1. Physical change that can be reversed. Explanaon: Crystallisaon is a physical process and can be reversed.

Q33. Which of the following statements is incorrect for a chemical reacon?

  1. Heat may be given out but never absorbed.
  2. Sound may be produced.
  3. A colour change may take place.
  4. A gas may be evolved.

1 Mark

Ans: 1. Heat may be given out but never absorbed. Explanaon: Heat may be given out as well as absorbed during chemical reacons.