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What is the main difference between gold and brass?

Answer and explanation

Correct answer: Gold is element brass is alloy

Direct answer: Option A, gold is an element and brass is an alloy. Gold consists of only gold atoms and is an element, represented by Au. Brass is not a single element; it is an alloy, usually made mainly by mixing copper and zinc. An alloy is a homogeneous mixture of metals or a metal with another element, and its composition can vary. A is therefore correct. B reverses both classifications: gold is not a mixture, and brass is not an element. C is wrong because gold and brass are solids at ordinary conditions, not gases. D is wrong because gold and the metals in brass are metals, not non-metals. The important reasoning is to distinguish a pure element from a material made by mixing substances. Brass may look uniform, but uniform appearance does not make it an element or compound. Memory cue: gold has one atomic kind; brass is blended metal, so it is an alloy mixture.

Related tags

ChemistryNature-Of-MatterClass-11

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