Discussion
Assertion: water softened by the zeolite process is fit for a high pressure boiler. Reason: its hardness is reduced to a very low figure.
Answer: C
Correct answer: the assertion is false although the reason offered is a true statement in itself
The reason is true - zeolite softening does reduce hardness to a very low figure - but the assertion does not follow. The process exchanges rather than removes, so the total dissolved solids are unchanged and the water leaves carrying sodium salts, including bicarbonate, which decomposes in the boiler to give caustic alkalinity. A high pressure boiler needs demineralised water.
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