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The scum formed when soap is mixed with hard water could ...

The scum formed when soap is mixed with hard water could be

A.

calcium trioxocarbonate (IV)

B.

propane- 1, 2, 3 - triol

C.

calcium hydrogentrioxocarbonate (IV)

D.

magnesium tetraoxosulphate (IV)

E.

calcium stearate

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Correct answer is A

No explanation has been provided for this answer.

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