Four complexes are given :
`(P) [CoCl(NH_(3))_(5)]^(2+)" "(Q) [Co(NH_(3))_(5)(H_(2)O)]^(3+)`
`(R ) [Co(NH_(3))_(6)]^(3+)" "(S) [Co(CN)_(6)]^(3-)`
All of them exhibit at least one of the following 4 colours viz, violet, red, yellow orange, pale yellow. One of them absorbs light in the U.V. region.
Choose the correct statement(s).

Options

A. Order of wavelength of light absorbed : `PgtQgtRgtS`
B. S must be violet in colour
C. R must have absorbed wavelength of blue colour light
D. Q must be pale yellow in colour

Answer

A, C

Explanation

Order of `Delta_(0) : (S) gt (R ) gt (Q) gt (P), Delta_(0) prop(1)/(lambda_(abs))`