Dextrin is

Quartzite, a metamorphic stone is

Refractory bricks are used for

Dolomite is a lime stone which contains carbonate of magnesia upto

For light and ornamental casting, the most unsuitable pig iron, is

Lime putty

Minimum required water cement ratio for a workable concrete, is

Duco is one of the patent forms of

Pick up the rock which is not a sedimentary rock from the following: