Environmental Engineering
In lime-soda process

Only noncarbonated hardness is removed
Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness
Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness
Only carbonate hardness is removed

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Environmental Engineering
Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters.Reason R: The sand used in slow sand filters is finer than that in rapid sand filtersSelect your answer based on the coding system given below:

A is true but R is false
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is false but R is true

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