Slate is formed by metamorphic action on

The main constituent which imparts hydraulicity to hydraulic lime is

Pick up the correct statement from the following:

The softest rock is

Addition of pozzolana to ordinary Portland cement increases

Bessemer process is used for the manufacture of

Pick up the correct statement from the following:

The normal consistency of ordinary Portland cement is about

Which of the following metamorphic rocks has the most weather resisting characteristics?