Compound A is formed by fusing sodium carbonate, china clay and quartz . It is used to remove permanent or temporary hardness of water . Compound A is
Sodium Hexametaphosphate
Sodium aluminium silicate
Slaked lime
Sodium bicarbonate
As we have learnt,
Upon fusion of sodium carbonate, china clay and quartz, Sodium alumino silicates are obtained which are also called as Zeolites or Permutit
Therefore, option(2) is correct.
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