UPSC Civil Service Exam Questions - Engineering

Q1:

Which one of the following statements is correct ? In the lime-soda process of water softening

A lime reduces carbonate hardness while soda removes non-carbonate hardness

B only carbonate hardness is removed

C lime reduces non-carbonate hardness while soda removes carbonate hardness

D Only non-carbonate hardness is removed.

ANS:A - lime reduces carbonate hardness while soda removes non-carbonate hardness

No answer description is available.