Electrical wires have a coating of an insulating material. The material generally used is

Brass is an alloy of

Which substance is used for the chemical reduction of metal oxides like chromium and manganese to obtain the metal?

Give reasons for the following:
$(i)$ Gold and platinum are used in jewellery.
$(ii)$ Copper cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel does not rust easily.
$(iv)$ Metals can be given different shapes according to our needs.
$(v)$ Zinc does not give hydrogen gas on reacting with $HNO_3$.

What is the molecular formula of phosphorus pentoxide?

An alloy has a low melting point and is,therefore,used for electrical fuses. Name the alloy and write its constituents.