The furring of kettles is caused by the presence in water of
calcium hydrogentrioxocarbonate (IV)
calcium trioxocarbonate (IV)
calcium tetraoxosulphate (VI)
calcium hydroxide
Correct answer is B
Furring of kettles is caused by the temporary hardness in water. Temporary hardness in water is caused by calcium and magnesium trioxocarbonate (IV)
CaCO3 causes the furring of kettles