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The ppm is one part of calcium carbonate equivalent hardness is present in __________ of water.

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The ppm is one part of calcium carbonate equivalent hardness is present in __________ of water.

(a) One

(b) One million

(c) One billion

(d) One trillion

This question was addressed to me by my college professor while I was bunking the class.

My question comes from Problems, Units and Formulae topic in chapter Water of Applied Chemistry

1 Answer

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Best answer
Right option is (b) One million

Easy explanation: The ppm is one part of calcium carbonate equivalent hardness is present in the one million parts of water.

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