Question

Gold is alloyed with which metal to make it harder?
A) Cu
B) Hg
C) Ag
D) C

Answer 1

Gold is a naturally occurring chemical element with the symbol Au and atomic number 79, making it one of the higher atomic number elements. It is a brilliant, somewhat reddish yellow, dense, soft, malleable, and ductile metal in its purest form. Gold is a transition metal and a member of group 11 of the periodic table. It's one of the least reactive chemical elements, and it's solid at room temperature. In rocks, veins, and alluvial deposits, gold is frequently found in its free elemental (native) form, as nuggets or grains.

Complete Step By Step Answer:
Because pure gold is too soft for everyday use, it is alloyed with a variety of metals such as silver, copper, platinum, palladium, and zinc to provide strength and durability.
The weight of gold is measured in karats, not "carats," which is the unit of measurement for diamonds.
The gold content and price increase as the K number rises. The number of carats in an alloy refers to how much pure gold is contained in each of the 24 parts by weight.
The eighteen-karat rose gold alloy, which is produced by adding copper, is a popular coloured gold alloy. Palladium and nickel alloys are also significant in commercial jewellery because they generate white gold alloys. The hue of a fourteen-karat gold-copper alloy is virtually identical to that of some bronze alloys, and both may be used to make police and other badges. Green gold refers to 14- and 18-karat gold alloys that are mostly made of silver and appear greenish-yellow. By alloying with iron, blue gold may be created, and by alloying with aluminium, purple gold can be created.
Hence option A and C is correct.

Note:
Red gold, often known as pink gold or rose gold, is a gold and copper alloy. Because copper has a bright pinkish-orange colour, mixing it with gold results in a lovely pinkish gold colour.
The colour of the gold is determined by the quantity of copper used. The greater the red coloration, the more copper is utilised.
When worn on the skin, yellow gold has a very warm and beautiful appearance and feel. When it comes to commemorating life's most important moments, yellow gold is a perfect present. The final colour of yellow gold can be altered by the addition of several additional metals.