Which of the following factors affect the value of `alpha_(obs)`?
(i) Solvent (ii) Temperature
(iii) Wavelength (iv) Concentration

Options

A. (ii) and (iv)
B. (ii) and (iii)
C. (i),(ii) and (iii)
D. (i),(ii),(iii) and (iv)

Answer

D

Explanation

Since the rotation of polarized light is caused by inreraction of the photon of light with an enatiomertic molecule, the extent of rotation is a function of the configuration of the molecule and the number of molecules in the path of the light beam, the latter depends on the concentration and the length of the tube holding the enantiomer. Other factors are: the solvent (if present), the temperature, and the wavelength of the light used.