What happenes when `D-`glucose is treated with the following reagents?
(i). `HI`
(ii).Bromine water
(iii). `HNO_(3)`

Explanation

(i) Reaction with HI
`underset("Glucose")(CHO(CHOH)_(4))CH_(2)OH overset(HI//P)underset("Reduction")rarr underset("2-Iodohexane")(CH_(3)CHI(CH_(2))_(3)CH_(3))+underset("n-hexane")(CH_(3)(CH_(2))_(4)CH_(3))`
(ii) Reaction with bromine water
`underset("Glucose")(CHO(CHOH)_(4))CH_(2)OH overset(Br_(2)//H_(2)O)underset("Oxidatrion")rarr underset("Gluconic acid")(HOOC(CHOH)_(4)CH_(2)OH)`
(iii) Reaction with `HNO_(3)`
`underset("Glucose")(CHO(CHOH)_(14))CHO overset(HNO_(3))underset("Oxidation")rarr underset("Saccharic acid")(HOOC(CHOH)_(4)COOH)`