Q88 / 180 · NEET 2016 (Phase 2) · Chemistry

The correct corresponding order of names of four aldoses with configuration given below respectively, is

Figure 

  • A
    L-erythrose, L-threose, L-erythrose, D-threose.
  • B
    D-threose, D-erythrose, L-threose, L-erythrose.
  • C
    L-erythrose, L-threose, D-erythrose, D-threose.
  • Correct answer
    D
    D-erythrose, D-threose, L-erythrose, L-threose.

Solution

If the alcoholic group is present on the left side of the last chiral carbon then it is D- sugar and if it is on the left side then it is L- sugar.

All the four given molecules with their names are given below. Figure

Hence, the correct answer is option: 'D'.

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