Earn $100 Online Daily. Work From Home. Click Here

What is the correct answer?


Permanent hardness of water can be removed by

A. Addition of soda ash to it

B. Treating it with zeolites

C. Passing it through sodium hexametaphosphate

D. All (A), (B), and (C)

Related Questions

Cement mainly contains Absorption of SO3 in 97% H2SO4 is Pick out the wrong statement. Electro deposition of metals i.e. electroplating is never done on __________ is an ore concentrating metallurgical process involving a chemical… An alkali metal salt of Palmitic acid is known as Esterification reaction In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the… Enzymes are organic catalysts used in the __________ reactions. __________ is a thermosetting plastic. Salt is added in the kettle during soap manufacture to separate Comparing sulphate process with sulphite process, we find that __________… Dehydrogenation of Isopropanol produces Economics of 'Solvay Process' depends upon the efficiency of Hydrazine (N2H4) is used mainly as a/an Favourable conditions for the liquefaction of gases in general are Pitch (a product of coal tar distillation) is always mixed with creosote… Builders are added in soap to act as At very high concentration of enzymes, the rate of fermentation chemical… Starting raw material for the manufacture of alum is Oxygen is separated by distillation from air after its liquefaction. The… Lindane is Type of glass used in optical work is the __________ glass. Direct conversion of chemical energy into electrical energy is done in… __________ of rubber decreases after its vulcanisation. Thermosetting materials Platinum catalyst used in the earlier days of sulphuric acid manufacture… Hydrolysis of sugar is called __________ acid is an unsaturated fatty acid. Flexible foam (for mattresses) is usually made of