What is the secondary standard for TDS?

___________ has high degree of porosity.

What is the preferred regenerant in case of cation exchanger?

Phosphorus is the main component of synthetic detergents.

What is the maximum time required for ozone degradation?

Which of these do not cause scaling of the membranes?

What is the range of bonding energies of carbon?

NaCl is hydrolysed to chlorine and __