Classify the following as physical


Classify the following as physical or chemical properties (CBSE 2012)

1. The composition of a sample of steel is : $98 \%$ iron. $1-5 \%$ carbon and $0-5 \%$ other elements.

2. Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.

3. Metallic sodium is soft enough to be cut with a knife.

4. Most metal oxides form alkalis on interacting with water.


1. Physical

2. Chemical

3. Physical

4. Chemical.

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