Which regions of the light radiations of the visible ultraviolet lying – McqOptions

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1.	Which regions of the light radiations of the visible ultraviolet lying between wavelength are chiefly concerned in bringing about photochemical reactions?
A.	1000 and 2000
B.	1500 and 1000
C.	8000 and 2000
D.	19000 and 12,000
Answer» D. 19000 and 12,000

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