Tearing paper is generally:
- a. Chemical to new element
- b. Physical change
- c. Rusting
- d. Neutralisation
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Physical and Chemical Changes — Practice
Rusting, crystallisation, examples.
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Boiling water is:
- a. Chemical to hydrogen always
- b. Rusting
- c. Physical change
- d. Photosynthesis
Rusting produces:
- a. Only pure shiny iron forever
- b. Only solid oxygen
- c. New substance called rust
- d. Only plastic
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