Which of the following statements are fa...

Which of the following statements are false.
`Ca(OH)_(2)` is called slaked lime
`Mg^(2+)` and `Ca^(2+)` ions are responsible for the transmission of electrical impulses along the nerve fibre
`Ca^(2+)` ion is present in chlorophyll pigment
The enamel on teeth is a double salt of `Mg`

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