PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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5. True or False. If False, give the correct answer II

1. If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a periodic change.

A periodic change occurs when the chemical properties of a substance stay unchanged while the appearance or shape of the substance changes.
If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a fossil change.

2. Tarnishing of silver is an example of endothermic change.

Tarnishing of silver is an example of physical change.
Silver tarnishing is an example of endothermic change.

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