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A mixture of carboxyliic acids (X) and (...

A mixture of carboxyliic acids `(X)` and `(Y)` cannot be separated by normal methods however when this mixture is treated with optically active quinine give optically acitve salts `(P)` and `(Q)`. These two salts can be separated by fractional crystallization, separated and acidified with `HCl` to from amines and carboxylic acids.
The compound `(X)` and `(Y)` may be

A

`CH_(3)COOH,CH_(3)CH_(2)COOH`

B

C

`(+)` and `(-)` - Tartaric acid

D

`CH_(3)CH_(2)CH_(2)COOH, CH_(3)CH_(2)CH_(2)CH_(2)COOH`

Text Solution

Verified by Experts

The correct Answer is:
C
This is a method of optical resolution because only optically active mixture cannot be separated by usual method hence choice (c) is correct while (a),(b) and (d) are wrong.
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Tartaric acid [HO_(2)CCH(OH)CH(OH)CO_(2)H] was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid are optically inactive. One optically inactive form (P) has a melting point of 210- 212^(@) C and can be separated into two optically acitve forms, whereas other optically inactive form (Q) cannot be resolved further. A optically inactive form P is :

Knowledge Check

  • A mixture of carboxylic acids (X) and (Y) cannot be separated by normal methods howerver when this mixture is treated with optically active quinine give optically acitve salts (P) and (Q) . These two salts can be separated by fractional crystallization, separated and acidified with HCl to from amines and carboxylic acids. (P) and (Q) are separated by fractiional crystallization due to

    A
    difference in boiling point
    B
    difference in solubility
    C
    difference in melting poilnt
    D
    difference in thermal stability

  • The constituents of a heterogeneous mixture are X, Y and Z. If mixture containing X and Y is taken, X can be separated using magnetic separation, Y and Z can be separated using distillation method. Which of the following best identifies X, Y and Z respectively?

    A
    Iron, salt, water
    B
    Sulphur, carbon disulphide, water
    C
    Gun powder, common salt, water
    D
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  • Tartaric acid [HO_(2)CCH(OH)CH(OH)CO_(2)H] was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid are optically inactive. One optically inactive form (P) has a melting point of 210- 212^(@) C and can be separated into two optically acitve forms, whereas other optically inactive form (Q) cannot be resolved further. Optically inactive form Q is

    A
    B
    C
    D
    none of these

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