Dust of pure _____ is used to cover the article to be treated for corrosion in the method of sherardising.

Which of the following is not a variety of pig iron?

The dragged finish is suitable for only soft stones.

Blasting powder is a mixture of _________

Dolerite is an example of ____ rock.

Which of the following is the red oxide of iron?

Augite forms crystals of ____ shape.

Which metal is used in the galvanisation of iron in order to prevent it from rusting?