Chemistry > 2005 > 19
JAMB UTME
When water boilers are used for a long period of time, the solid substances left
behind as scale are
behind as scale are
A.
magnesium trioxosilicate (IV) and rust
B.
magnesium trioxosilicate(IV) and calcium tetraoxosulphate(VI)
C.
clay and magnesium trioxosilicate(IV)
D.
clay and rust
Answer: B
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