…………… is one of the most widely distributed minerals found in the earth's crust.

1. Iron ore
2. Copper
3. Coal
4. Limestone

Which ore of iron is reddish in colour?

1. Magnetite
2. Haematite
3. Limonite
4. All of the above.

Name the best quality of iron that contains more than 70 per cent of iron.

1. Magnetite
2. Limonite
3. Haematite
4. Ironite

About 90 per cent of iron ore is used to make ……………. .

1. Bauxite
2. Steel
3. Brass
4. Bronze