Two aldopentoses A and B give the same osazone derivation. A is oxidised to an optically active aldaric acid by dilute nitric acid. Ruff degradation of B gave a tetrose which was similarly oxidised to an optically active aldaric acid. Assign the structure of A and B from the following list:

A = I, B = I V

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A = I V, B = I

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A = I I I, B = I I

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A = I I, B = I I I

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Solution

The correct option is C $A = I I I, B = I I$

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Similar questions

Q. Identify A, B, and C.

i) Isomeric alcohols (A), (B), and (C)

(C_{5} H_{12} O)

.
ii) (A) and (B) react with chromic acid solution. (B) gives an acid (D).
iii) Reactivity with HBr is:

C > A ≫ B .

All give the same compound,

C_{5} H_{11} B r (E) .

iv) Only (A) is oxidised by NaOI.

Q. Match the List I to List II :
(A)A-ii; B-i; C-iii; D-iv
(B)A-i; B-ii; C-iii; D-iv
(C)A-iii; B-ii; C-iv;D-i
(D) A-iv; B-iii; C-ii; D-i

Q. Match List I to List II :
(A)A-i; B-ii; C-iii; D-iv
(B) A-iv; B-ii; CUi;D-i
(C)A-iii; B-ii; C-i; D-iv
(D) A-iii; B-i, C-ii, D-iv

In an equilateral triangle ABC , match the following ratios to the values

$\begin{matrix} T r i g n o m e t r i c r a t i o s & V a l u e s (i) t a n 60^{\circ} & (a) \frac{1}{\sqrt{3}} (i i) c o t 30^{\circ} & (b) \sqrt{3} (i i i) c o s e c 30^{\circ} & (c) 2 (i v) s e c 30^{\circ} & (d) \frac{2}{\sqrt{3}} \end{matrix}$

Question 16.
Which of the following phenomena occur, when a small amount of acid is added to water?
(i) Ionisation
(ii) Neutralisation
(iii) Dilution
(iv) Formation

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)

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Two aldopentoses A and B give the same osazone derivation. A is oxidised to an optically active aldaric acid by dilute nitric acid. Ruff degradation of B gave a tetrose which was similarly oxidised to an optically active aldaric acid. Assign the structure of A and B from the following list:

The correct option is C A=III,B=II

The correct option is C $A = I I I, B = I I$