Question

2.2 Give reasons for the following: [5] 1. Metals form cations while non-metals form anions. 2. Potassium reacts vigorously with cold water while copper does not react with water or steam. 3. Rusting reduces the structural strength of iron. 4. A suspension of rust is basic in nature. 5. Galvanized steel is not used for articles used for edible applications. 151​

Answer 1

Answer:

Explanation:

Metals lose or donate their valence electrons and form cations while non-metals gain or accept valence electrons to form anions.

Potassium is the most reactive metal while copper is the least reactive metal.

Rusting corrodes iron thereby reducing the structural strength of iron.

Rust is formed when iron reacts with atmospheric air and oxygen in it with the presence of moisture which makes it a metallic oxide, and metallic oxides are basic in nature.

Galvanized steel has zinc coating on it which dissolves in food acids and forms poisonous compounds, hence it is not used for edible applications.

Answer 2

2.2 Give reasons for the following:

Answer:

Solution :-

1. Metals lose or donate their valence electrons and form cations while non-metals gain or accept valence electrons to form anions.
2. Potassium is the most reactive metal while copper is the least reactive metal.
3. Rusting corrodes iron thereby reducing the structural strength of iron.
4. Rust is formed when iron reacts with atmospheric air and oxygen in it with the presence of moisture which makes it a metallic oxide, and metallic oxides are basic in nature.
5. Galvanized steel has zinc coating on it which dissolves in food acids and forms poisonous compounds, hence it is not used for edible applications.

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