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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
Sugar candy (Mishri)
Turns lime water milky
Physical change
Chemical change
Rust
(b).
Depositing a layer of zinc on iron
Physical change
Chemical change
Turns lime water milky
Sugar candy (Mishri)
Galvanisation
Rust
(c).
Souring of milk
Galvanisation
Physical change
Turns lime water milky
Chemical change
Rust
Sugar candy (Mishri)
(d).
Carbon dioxide
Rust
Physical change
Chemical change
Sugar candy (Mishri)
Galvanisation
Turns lime water milky
(e).
Iron oxide
Sugar candy (Mishri)
Chemical change
Rust
Physical change
Turns lime water milky
Galvanisation
(f).
Dissolving common salt in water
Turns lime water milky
Physical change
Sugar candy (Mishri)
Galvanisation
Chemical change
Rust
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