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Question

Boiling water is a _____ change because _____.
  1. Physical, the gaseous water produced is chemically identical to the liquid water the process began with
  2. Physical, the water was disappeared
  3. Chemical, heat was required for the change
  4. Chemical, the process produced a gas

A
Chemical, the process produced a gas
B
Chemical, heat was required for the change
C
Physical, the gaseous water produced is chemically identical to the liquid water the process began with
D
Physical, the water was disappeared
Solution
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Boiling water is a physical change because the gaseous water produced is chemically identical to the liquid water i.e both of them have the same molecular structure of the water.

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