When water boilers are used for long period of time, the ...
When water boilers are used for long period of time, the solid substances left behind as scale are
magnesium trioxosilicate (IV) and rust
magnesium trioxosilicate (IV) and calcium tetraoxosulphate (VI)
clay and magnesium troxosulphate (IV)
clay and rust
Correct answer is A
No explanation has been provided for this answer.