Which of the following acid that results in selective removal of alum – McqOptions

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1.	Which of the following acid that results in selective removal of aluminum in aluminum bronzes?
A.	Hydrochloric acid (HCl)
B.	Hydrofluoric acid (HF)
C.	Nitric acid (HNO3)
D.	Hydrochloric, hydrofluoric and nitric acid
Answer» C. Nitric acid (HNO3)

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