Spectrophotometry is a laboratory technique
that can be performed first to check if there is presence of arsenic mixed in
with Gatorade. In spectrophotometry, arsenic concentration will be measure in a
specific solution by calculating the amount of light absorbed by inorganic
arsenic.
Various analytical reagents are used such as molybdate reagent and variamine blue
as a chromogenic reagent where a violet colored indicates presence of arsenic.
Furthermore,
new analytical reagents has been development and proposed like vanillin-2-
amino nicotinic acid (VANA) and 2, 4-Dihydroxy benzophenone-2-amino thiophenol
(BPBT). These are used for direct non-extractive spectrophotometric determination of arsenic. The reagent
reacts with arsenic in acidic
medium to form light greenish yellow colored.
The answer is C in this question.
The answer is b . Because they <span>are gaps in the geologic record that may indicate episodes of crustal deformation, erosion, and sea level variations. They are a feature of stratified rocks, and are therefore usually found in sediments (but may also occur in stratified volcanics)</span>