A) \[{{H}_{2}}S{{O}_{4}}\]
B) \[A{{l}_{2}}{{O}_{3}}\]
C) \[{{H}_{3}}P{{O}_{4}}\]
D) All of these
Correct Answer: D
Solution :
\[{{H}_{2}}S{{O}_{4}},A{{l}_{2}}{{O}_{3}}\] and \[{{H}_{3}}P{{O}_{4}}\] all can act as dehydrating agent.
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