PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoIf you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(a). Do you think rust is different from iron?
(b). Can you change rust back into iron by some simple method?
(c). Do you think formation of rust from iron is a chemical change?
(d). Give two other examples of a similar type of change.
(a). Do you think rust is different from iron?
(b). Can you change rust back into iron by some simple method?
(c). Do you think formation of rust from iron is a chemical change?
(d). Give two other examples of a similar type of change.
(a). Iron and rust are not the same. Iron gets covered in a flaky, substance called rust when it comes into contact with moist air. Rust is the .
(b). , rust cannot be converted back into iron since it has undergone a chemical change, and chemical changes are and produce new substances.
(c). , iron rusting is a chemical change. During rusting, iron combines with oxygen in the presence of water (moisture) to form a new compound, iron oxide, which is rust.
(d). The setting of curd from milk.
Burning of magnesium ribbon to form .
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