Pick up the correct statement from the following:

Pick up the correct statement from the following:

Duco is one of the patent forms of

The wedging is adopted for quarrying costly stratified rock such as

The method of addition polymerization is used for obtaining:

Pegmatite is a/an

Pick up the correct statement from the following:

The weight of 1 m3 of brick earth, is about

The initial setting time of hydraulic lime, is