Halogen acid used in the preparation of aqua regia is [DPMT 2002]

1.	Halogen acid used in the preparation of aqua regia is [DPMT 2002]
A.	HBr
B.	HI
C.	HCl
D.	HF
Answer» D. HF

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Halogen acid used in the preparation of aqua regia is [DPMT 2002]

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