Which one is known as oil of vitriol?
- A$H_2SO_3$
- B$H_2SO_4$
- C$H_2S_2O_7$
- D$H_2S_2O_8$
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View SolutionObserve the following reactions:
$P_4 + 8SOCl_2 \longrightarrow 4PCl_3 + 4SO_2 + 2S_2Cl_2$
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In both the reactions,a common product '$x$' is obtained. The number of lone pair of electrons on the central atom of '$x$' is:
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