Assertion (A): Iron ore forms the backbone of modern civilisation.

Reason (R): The iron ore deposits in India occur as hill masses and are easily accessible.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

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

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

What is also known as 'Black ore'?

1. Limonite
2. Haematite
3. Magnetite
4. None 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