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MCQMediumJEE Main 2023 · 11 April, Shift 1Carbohydrates (Glucose, Fructose, Sucrose…)

Chemistry Question from JEE Main 2023 · 11 April, Shift 1

L-isomer of tetrose X (C4H8O4C_4H_8O_4) gives positive Schiff's test and has two chiral carbons. On acetylation, 'X' yields triacetate. 'X' undergoes following reactions:

Reaction scheme showing compound X oxidized by HNO3 to A and reduced by NaBH4 to B.

'X' is:

  • A
    Fischer projection of an aldotetrose: CHO at top, HO on the left at both stereocentres, CH2OH at the bottom.
  • B
    Cyclic form of an aldotetrose drawn with the ring oxygen on the left: H-OH at the upper centre, HO-H at the lower centre, CH2OH at the bottom.
  • C
    Cyclic form of an aldotetrose drawn with the ring oxygen on the left: H-OH at both centres, CH2OH at the bottom.
  • D
    Fischer projection of an aldotetrose: CHO at top, H-OH (OH on the right) at the upper stereocentre, HO-H (OH on the left) at the lower stereocentre, CH2OH at the bottom.

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