JEE Main Chemistry question

Fructose or ketohexose contains:

(A)5 groups
(B)3 secondary alcoholic groups
(C)2 primary alcoholic groups and one keto group
(D)All of the aboveCorrect

Answer: (D)

Solution

Fructose, CH_2OH-CO-CHOH-CHOH-CH_2OH, has hydroxyl groups at C1, C3, C4, C5 and C6 (five groups in all), of which C1 and C6 are primary alcoholic groups, C3/C4/C5 are

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Question ID VK-151059