Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the________?

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the________?

Froth floatation is the most suitable for treating ________?

Turbine impeller________?

The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)________?

-10-5 fertilisers mean that they contain________?