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Reversible and Irreversible Changes

A quiz about reversible and irreversible physical and chemical changes, including thermal expansion, state changes, and chemical reactions.

17 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

All chemical reactions are :

  1. reversible
  2. irreversible
  3. exothermic
  4. endothermic
Question 2 Multiple Choice (Single Answer)

Which of the following changes are irreversible?

  1. Milk to paneer
  2. Cow dung to biogas
  3. Grain to its flour
  4. All of the above
Question 3 Multiple Choice (Single Answer)

 Iron adopts changes slowly and gradually by process of :

  1. rusting
  2. moldings
  3. fermentation
  4. explosions
Question 4 Multiple Choice (Single Answer)

 Burnt sparklers and burnt books pages are examples of 

  1. reversible change
  2. irreversible change
  3. no change
  4. none of the above
Question 5 Multiple Choice (Single Answer)

Which of the following is not a reversible change?

  1. Heating of water to steam
  2. Cooking of egg to scrambled eggs
  3. Heating of wax to molten wax
  4. Cooling a cake
Question 6 Multiple Choice (Single Answer)

Which of the following change cannot be reversed ?

  1. Hardening of cement
  2. Freezing of ice cream
  3. Opening a door
  4. Melting of choclate
Question 7 Multiple Choice (Single Answer)

Burnt sparklers and burnt books pages are examples of:

  1. reversible process
  2. irreversible process
  3. rusting
  4. none of these
Question 8 Multiple Choice (Single Answer)

Which of the following changes are irreversible?

  1. Raw egg to boiled egg
  2. Woollen yarn to knitted sweater
  3. Bud to flower
  4. All of the above
Question 9 Multiple Choice (Single Answer)

Which of the following represents a reversible change?

  1. A metal rod on heating expands (its length increases).
  2. A metal rod on cooling contracts (its length decreases).
  3. Both of the above
  4. None of the above
Question 10 Multiple Choice (Single Answer)

Small gaps are left between the metal rails on railway tracks in order to allow for :

  1. expansion of the metal rails on cold days
  2. contraction of the metal rails on hot days
  3. contraction of the metal rails on cold days
  4. expansion of the metal rails on hot days
Question 11 Multiple Choice (Single Answer)

Which of the following is true about dissolving:

  1. Dissolving is an example of a reversible change.
  2. Dissolving is an example of a irreversible change.
  3. It depends on the conditions of dissolution.
  4. None of the above.
Question 12 Multiple Choice (Single Answer)

Railway tracks have gaps between them to deal with expansion in :

  1. hot days
  2. cold days
  3. winters
  4. snow fall
Question 13 Multiple Choice (Single Answer)

Heating will produce what sort of change?

  1. An irreversible change
  2. A reversible change
  3. Either a reversible or irreversible change
  4. Neither a reversible or irreversible change
Question 14 Multiple Choice (Single Answer)

What is a reversible change?

  1. A material changes permanently into a new material
  2. A material changes its feel or appearance, but it is still the same material
  3. A material changes into a new material, but it can be changed back
  4. A material stops existing
Question 15 Multiple Choice (Single Answer)

The change of state of water from one form to another is :

  1. chemical change
  2. irreversible change
  3. reversible change
  4. state variation
Question 16 Multiple Choice (Single Answer)

Consider the expansion and contraction among solids, liquids and gases, the one which has a greater tendency to expand is :

  1. solid
  2. liquid
  3. gas
  4. none of these
Question 17 Multiple Choice (Single Answer)

Brown colour of the apple after cutting is:

  1. physical change
  2. biological change
  3. chemical change
  4. no change
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