Why is blood red in colour?

Why are red blood cells red in colour ?

Sodium extract gives blood red colour when treated with FeCl_(3) . Formation of blood red colour confirms the presence of

Which of the following gives blood red colour with KCNS?

In the qualitative analysis of group 3 cations blood red colouration is a test for

Which of the following anions gives blood red colour with neutral FeCl_(3) solution ?

Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride .

Sodium extract of an organic compound gives blood red colour with FeCl_3 . It contains