Which of the following chemical reagents is not used in the purification of water? A)NaNO₃ B)Cl₂ C)CaO D)Al₂(SO₄)₃

Name: Which of the following chemical reagents is not used in the purification of water? A)NaNO 3 B)Cl 2 C)CaO D)Al 2 (SO 4 ) 3
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NaNO₃ (sodium nitrate) is not typically used in the purification of water. The other options listed (Cl₂, CaO, and Al₂(SO₄)₃) are commonly used in water treatment processes.

Which of the Following Chemical Reagents Is Not Used in the Purification