PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoChoose the correct answer:
1. A fractured bone is fixed with a paste made of Plaster of Paris (POP). It is a powdery substance which is used as a coating over the bandage on the fractured bone. After a few hours, the POP becomes hard and dry.
This change occurred in POP is a
This change occurred in POP is a
2. Neha was boiling water in a pan. Her sister Rhea observed that some bubbles are formed during boiling of water. Neha told Rhea that boiling of water is a chemical change as gas is evolved. But Rhea argued that it is not a chemical change. What kind of change is this?
3. The phase change between liquid to solid on cooling is known as
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