Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]

1.	Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]
A.	\[{{H}_{2}}S{{O}_{3}}\]
B.	\[{{H}_{2}}S{{O}_{4}}\]
C.	\[{{H}_{2}}{{S}_{2}}{{O}_{7}}\]
D.	\[{{H}_{2}}{{S}_{2}}{{O}_{8}}\]
Answer» C. \[{{H}_{2}}{{S}_{2}}{{O}_{7}}\]

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Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]

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