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Byju's Answer
Standard X
Physics
Phase Change
Question 7Sta...
Question

Question 7

State true or false for the following:

  1. The evaporation of water is a reversible change.

  2. The melting of wax is a chemical change.

  3. Rusting iron is an irreversible change.

  4. The change of seasons in a year is a periodic change.


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Solution

  1. True

  2. False

  3. True

  4. True


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Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Digestion of food is a Q irreversible change. ( )
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(a) All irreversible changes are chemical changes.
(b) A liquid can sublime.
(c) The evaporation of water take place only at 100°C. when it is boiling.
(d) The melting of ice is a physical change.
(e) The souring of milk is a periodic change.
(f) The flowering of trees is a periodic change.
(g) Solidification and condensation are the same.
(h) The breaking of glass tumbler is a chemical change because it is irreversible.
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(a) reversible change
(b) irreversible change
(c) periodic change
(d) non-periodic change
Q. Melting of wax and heating of blade are the examples of
(a) physical change
(b) chemical change
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(d) irreversible change
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1. Melting of ice-cream is an example of a/an .................... (reversible/irreversible) change.
2. Ripening of fruits is an example of a/an .................... (reversible/irreversible) change.
3. Cooking of foood is an example of a/an .................... (reversible/irreversible) change.
4. Breaking of glass is a .................... (physical/chemical) change.
5. .................... (Heating/Cooling) causes steam to change into water.
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