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MCQ on stereochemistry: Page-3

The wave length of radiation used for determination of optical activity is
(A) 254 nm

(A) P

(B) Q

(C) R

(D) S

Specific rotation of an optically active compound is

(A) The optical rotation at specific chiral center

(B) Optical rotation of one molecule

(C) Optical rotation at unit length and unit concentration

(D) Optical rotation of pure eneantiomer

Calculate the optical purity of a compound with following data. optical rotation

(A) 10 %

(B) 90 %

(C) 60%

(D) 40%

(S)-lactic acid is dextrorotatory. (S)-sodium lactate will be

(A) Dextro

(B) Optically inactive

(C) Racemic

(D) None of the above

How many stereoisomers are possible for the following structure?
Tartaric acid

(A) 2

(B) 4

(C) 3

(D) 8