Problemas
This presumptive blood test uses phenolphthalein and turns pink when exposed to blood. Select one: a. Luminol b. Kastle-Meyer c. Precipitin d. Microcrystalline e. Hemastix
Roztwór
Mario
veterano · Tutor durante 11 años
4.7
(276 Votos)
Respuesta
b. Kastle-Meyer
Explicación
## Step 1The problem is asking us to identify a presumptive blood test that uses phenolphthalein and turns pink when exposed to blood. ## Step 2The Kastle-Meyer test is a presumptive blood test that uses phenolphthalein. When the test reagent is sprayed on a surface suspected of having blood, it will turn pink if blood is present. This is because the phenolphthalein in the reagent reacts with the iron in hemoglobin, a component of blood, to produce a pink color.## Step 3The other options provided, Luminol, Precipitin, Microcrystalline, and Hemastix, are also tests used in forensic science, but they do not use phenolphthalein and do not produce a pink color when exposed to blood.