Is it normal alum? – McqOptions

MCQOPTIONS

1.	Is it normal alum?
A.	K₂SO₄ - Al₂ ( SO₄ ) ₃ - 24H₂O
B.	K₂SO₄ - Al₂ (SO₄) ₃ - 21H₂O
C.	K₂SO₄ - Al₂ (SO₄) ₃ - 18H₂O
D.	K₂SO₄ - Fe₂ ( SO₄ ) ₃ - 24H₂O
Answer» B. K₂SO₄ - Al₂ (SO₄) ₃ - 21H₂O

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