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  • 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.

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.

Answers (1)

Solution:

Chemical property: When two substance combine to make a new compound, which does not show the properties of any reacting substances.
Physical property: Appearance, composition, state, melting point, elasticity, malleability etc.
(a) Physical property
(b) Chemical property
(c) Physical property
(d) Chemical property

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