MCQ
Which $L$ -sugar on oxidation gives an optically active dibasic acid
- ✓
- B
- C
- D
✓
Answer
Correct option: A.
a
Any sugar will be optically active when it does not have any plane of symmetry.
Any sugar will be optically active when it does not have any plane of symmetry.
As only $(a)$ and $(d)$ are $L$-sugar, $(b)$ and $(c)$ are $D$-sugar after oxidation.
$(a)$ (Refer to Image $1$)
As the product do not superimpose in its mirror image.
$(d)$ (Refer to Image $2$)
As it has plane of symmetry.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$KI$ in acetone, undergoes $S_N 2$ reaction with each $P, Q, R$ and $S$. The rates of the reaction vary as
→Which of the following isotope of hydrogen has maximum sum of electron $+$ proton $+$ neutron?
→An important insecticide is obtained by the action of chloral on chlorobenzene. It is
Ethylamine can be prepared by the action of bromine and caustic potash on
Considering the following reaction sequence, the correct statement(s) is(are)
→$(A)$ Compounds $P$ and $Q$ are carboxylic acids.
$(B)$ Compound $S$ decolorizes bromine water.
$(C)$ Compounds $P$ and $S$ react with hydroxylamine to give the corresponding oximes.
$(D)$ Compound $R$ reacts with dialkylcadmium to give the corresponding tertiary alcohol.
Two compounds $A$ and $B$ with same molecular formula $\left( C _{3} H _{6} O \right)$ undergo Grignard's reaction with methylmagnesium bromide to give products $C$ and $D$. products $C$ and $D$ show following chemical tests.
→| Test | $C$ | $D$ |
| Ceric ammonium nitrate Test | Positive | positive |
| Lucas Test | Turbidity obtained after five minutes | Turbidity obtained immediately |
| Iodoform Test | Positive | Negative |
$C$ and $D$ respectively are
Which reaction is $NOT$ a redox reaction?
→Dimethyl phthalate
→Number of moles $(x)$ of Grignard reagent consumed in the above reaction is
For which one of the following reactions ${K_p} = {K_c}$
→Which of the following has $p\pi - d\pi $ bonding
→