Question

Name two metals which are used for:
a) Making electric wires
b) Making domestic utensils and factory equipment.
c) Making jewelry and decorating sweets.

Answer 1

Hint: Copper and aluminum are used in making electric wires and also in making utensils. Because both are good conductors of heat and are less expensive than other metals. Gold and silver are used for making jewelry because of their reactivity. And foil named vark is used in decoration of sweets because they both are edible and flavorless.

Complete answer:
a) Copper and Aluminum are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. These metals are both ductile and relatively resistant to corrosion, but they also have different properties which make them useful for various applications.
b) Cooking utensils are made of metal such as Copper, Aluminum, so that heat is easily conducted through the base to their contents. But they are provided with handles of bad conductors such as ebonite or wood to hold them easily as handles will not conduct heat from the utensil to our hand.
c) Gold and Silver are used to make jewelry because the metals used in jewelry are always chosen on the basis of their reactivity. They are highly lustrous metals which are resistant to corrosion. They are highly malleable and ductile so can be transformed into any shape or design.
And Vark is a super fine filigree foil sheet of pure metals, typically silver but sometimes gold, used to decorate South Asian sweets and food to make them look more appetizing. The silver and gold are edible, though flavorless. Aluminum is also used in food decoration.

Note:
If Copper and Aluminum wiring are joined together using a simple twist-on splice, that presents an extra hazard because of their differing diameters and differing rates of expansion when heated and cooled. As long as the two are kept separate, that is not an issue.