Question 18Classify the following as physical or chemical properties. a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.(b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.(c) Metallic sodium is soft enough to be cut with a knife.(d) Most metal oxides form alkalis on interacting with water.

Question 18Classify the following as physical or chemical properties.

1.	Question 18Classify the following as physical or chemical properties. a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.(b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.(c) Metallic sodium is soft enough to be cut with a knife.(d) Most metal oxides form alkalis on interacting with water.
Answer» Question 18 Classify the following as physical or chemical properties. a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements. (b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas. (c) Metallic sodium is soft enough to be cut with a knife. (d) Most metal oxides form alkalis on interacting with water.