ICSE Class 7 Chemistry
Question 11 of 14
Matter and Its Composition — Question 10
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Question Question 12
Explain the term 'interconversion of matter' - with ice as a starting material. State the term which refers to the conversion of a substance on heating from -
(a) Solid state to liquid state.
(b) liquid state to vapour state.
(c) vapour state to liquid state.
(d) liquid state to solid state.
Taking ice as a starting material, 'interconversion of matter' can be understood in the following way:
- On heating, ice which is in solid state melts and changes into water which is in liquid state.
- On further heating, water changes into vapour which is in gaseous state.
- When water vapour is allowed to cool, it changes from gaseous state to liquid state forming water.
- On cooling water further, it changes to solid state forming ice.
Thus, 'interconversion of matter' involves change of state of matter from one state to another and back to its original state by change in temperature or pressure.
(a) Melting
(b) Vaporisation
(c) Liquefaction or Condensation
(d) Solidification or freezing