Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of

Related MCQs

• Permanent - hardness of water may be removed by addition of –
• If Metal A displaces Metal B from its solution, then Metal A               .
• The two metal ions that cause hardness to water are:
• A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be –
• Which method will be employed to test the hardness of water?
• Maximum permissible concentration of total hardness in drinking water is –
• Hardness of the water is commonly measured in terms of -
• Which metal does not undergo corrosion due to the formation of oxide layer?
• The luster of a metal is due to -
• Which metal is extracted from sea water?