Write two methods of preparation of glucose.

Explanation

Methods of preparations of glucose :
1) From sucrose : sucrose when boiled with dil/HCl in alcoholic solution then glucose, fructose are obtained in equal portions.
`underset("sucrose")(C_12H_22O_11)+H_2O overset(H^+)(to) underset("glucose")(C_6H_22O_6)+underset("fructose")(C_6H_12O_6)`
2) Form starch : starch undergo hydrolysis, with dil. `H_2SO_4` at 393k under pressure to from glucose.
`underset("starch")(C_6H_10O_5)_(n)+nH_2O underset(393K, 2-3 "atom")overset(H^+)(to) underset("glucose")(nC_6H_22O_6)`