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Subjects
Science CBSE
Class 7
Physical and chemical changes
Textbook questions
28.
NCERT Exemplar XIII
Exercise condition:
4
m.
Write word equations for two chemical reactions with the help of materials given in the box.
Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water.
(i)
.
Lime
Iron
Copper
+ Air + Water →
Iron hydroxide
Copper oxide
Iron oxide
.
(ii)
.
Copper sulphate
Copper oxide
Iron hydroxide
+ Iron →
Copper sulphate
Iron sulphate
Iron hydroxide
+ Copper.
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