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The purity of gold is expressedin carats. The purest form of gold is

The purity of gold is expressedin carats. The purest form of gold is/सोने की शुद्धता कैरेट में व्यक्त की जाती है। सोने का सबसे शुद्ध रूप है
(1) 24 carats/ 24 कैरेट  (2) 99.6 carats/99.6 कैरेट 
(3) 91.6 carats/91.6 कैरेट(4) 22 carats/22 कैरेट 

Answer / उत्तर :-

(1) 24 carats/ 24 कैरेट 

Explanation / व्याख्या :

Gold is a dense, soft, shiny, malleable and ductile metal. Gold has a bright yellow colour and luster traditionally considered attractive, which it maintains without oxidizing in air or water. The metal therefore occurs often in free elemental (native) form, as nuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds, usually with tellurium. Pure gold is too soft for day-to-day monetary use and is typically hardened by alloying with copper, silver or other base metals. The gold content of alloys is measured in carats (k). Pure gold is designated as 24k.Because of the softness of pure (24k) gold, it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, colour and other properties. Alloys with lower caratage, typically 22k, 18k, 14k or 10k, contain higher percentages of copper, or other base metals or silver or palladium in the alloy. Copper is the most commonly used base metal, yielding a redder colour.

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