__________ (5% on wood) is used usually after the addition of magnesiu – McqOptions

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1.	__________ (5% on wood) is used usually after the addition of magnesium ion. The mechanism for inactivating the ions by __________ precipitating the ions, but, strictly speaking, it is not a chelating agent.
A.	a)Sodium disulfate
B.	b)Sodium peroxide
C.	c)Sodium silicate
D.	d)Sodium hydroxide
Answer» D.

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