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question 22
which of the following is a physical change?
a dissolving metal in hydrochloric acid, hcl
b shattering a glass bottle of hydrochloric acid, hcl
c burning a match
d electrolysis of water (passing an electric current through water to create hydrogen gas and oxygen gas)

Explanation:

A physical change is one where the substance's chemical composition remains the same. Dissolving metal in HCl is a chemical reaction as new substances are formed. Burning a match and electrolysis of water also involve chemical reactions with new - substance formation. Shattering a glass bottle only changes the physical state (shape) of the glass, not its chemical composition.

Answer:

B. Shattering a glass bottle of hydrochloric acid, HCl