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\(C_{12}H_{22}O_{11(s)} + H_2SO_{4(aq)} → 12C(s...

C12H22O11(s)+H2SO4(aq)12C(s)+11H2O(l)+H2SO4(aq)
In the reaction above, tetraoxosulphate (VI) acid function as

A.

A dehydrate agent

B.

An oxidizing agent

C.

A reducing agent

D.

A catalyst

Correct answer is A

A dehydrating agent is a substance that dries or removes water from a substance.

so when sulphuric acid with sugar, the sugar is charred by the removal of water,  C12H22O11(s)+H2SO4(aq)12C(s)+11H2O(l)+H2SO4(aq)

the sulphuric acid is serving as a dehydrating agent.