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Science CBSE Homework Assignments
Class 7
Physical and chemical changes
Rusting & Crystallisation
3.
Rusting and Crystallisation II
Question:
6
m.
Match the items of Column I with the items of Column II.
Column I
Column II
(a).
Large crystals
Galvanisation
Chemical change
Sugar candy (Mishri)
Turns lime water milky
Physical change
Rust
(b).
Depositing a layer of zinc on iron
Turns lime water milky
Sugar candy (Mishri)
Chemical change
Physical change
Rust
Galvanisation
(c).
Souring of milk
Chemical change
Galvanisation
Sugar candy (Mishri)
Rust
Turns lime water milky
Physical change
(d).
Carbon dioxide
Physical change
Chemical change
Galvanisation
Sugar candy (Mishri)
Turns lime water milky
Rust
(e).
Iron oxide
Physical change
Chemical change
Rust
Sugar candy (Mishri)
Turns lime water milky
Galvanisation
(f).
Dissolving common salt in water
Galvanisation
Rust
Sugar candy (Mishri)
Turns lime water milky
Physical change
Chemical change
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