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JEE Advanced Chemistry Biomolecules 2019 JEE Advanced 2019 (Paper 1)

JEE Advanced Chemistry Question (2019) — Solution

Question

Which of the following statement(s) is(are) true?

Options

  1. A. Oxidation of glucose with bromine water gives glutamic acid
  2. B. The two six-membered cyclic hemiacetal forms of D - + - glucose are called anomers
  3. C. Hydrolysis of sucrose gives dextrorotatory glucose and levorotatory fructose
  4. D. Monosaccharides cannot be hydrolysed to give polyhydroxy aldehydes and ketones

Answer

D. Monosaccharides cannot be hydrolysed to give polyhydroxy aldehydes and ketones

Step-by-step solution

→ Glucose → [ 0 ] Br 2 -H 2 O Glycolic acid → ∝ - Δ - Glucose and β - D Glucose → Hydrolysis of sucrose given dextrorotatory glucose and levorotatory fructose, → Monosaccharide cannot be hydrolyzed to give polyhydroxy aldehyde and ketones.

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