Chemistry of Metals and Alloys

Metals are lustrous and so zinc will have a lustrous appearance.

Diamond is the hardest substance known.

All, iron, gold and copper can be drawn into wires.

Carbon cannot be used for making thin sheets as it is non-malleable.

Silver does not possess the property of magnetism.

This pair is incorrect as sulphur is not lustrous in nature, i.e. it is not shiny in nature.

Zinc does not show magnetic properties but the rest of them do show.

Magnetite is the most magnetic of all the naturally occurring materials on Earth.

Ebonite is made up of rubber and hence cannot be magnetized.

The copper is not used to make cover of switches because copper is a good conductor of electricity. We would get an electric shock when we touch the cover of switch. The copper is also used to make coins. The coins are made of copper because the coins made from copper stay around for many years.

The material iron is not used to make coins. It is because iron can easily rust on exposure to humid air. Silver is also used to make coin of higher value. Special coins are made, but not currency coins.

Since the metals like iron, copper, aluminium are hard and cannot be pressed easily, they are long lasting. Hence, these metals are used to make utensils.

It is very soft metal. It creates alloy with many metals and then the hardness increases.

Yes, it is the only non-metal in group 1. It is classed with group 1 because, like the alkali metals it has only 1 outer shell.

Sodium reacts vigorously with cold water displacing hydrogen.