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(a) Classify Brass and Diamond as elemen...

(a) Classify Brass and Diamond as element and mixture.
(b) How is a chemical change different from a physical change ?

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(a) Brass is a homogeneous mixture also called alloy. The constituents are Cu and Zn. Diamond is an element. It is an allotropic form of carbon.
(b) In a chemical change, a new substance is formed as a result of chemical reaction. No new substanceis formed in a physical change.
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DINESH PUBLICATION-IS MATTER AROUND US PURE-Short Answer Questions
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  5. Distinguish between elements and compounds with one example of each.

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  14. Can physical and chemical changes occur together ? Illustrate your ans...

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