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Q: When nitric acid HNO3 touches your skin a yellow spot develops. what does the spot indicate?
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Why is nitric acid yellow?

It is due to nitric dioxide gas contamination. Very pure nitric acid is clear because the synthesis of it removes it of nitric dioxide.


Which substance turns yellow when nitric acid is dropped on it?

spongebob:)


Why amino acids give yellow colour with nitric acid?

In this reaction the yellow xanthoproteic acid is formed.


Coral snake what is the key phrase?

Referring to the coloured bands... Red touches yellow - kill a fellow. Red touches black - venom lack. The order of the bands on a Coral snake is red, yellow, black, yellow. With the harmless king snake it's red, black, yellow, black.


What would be the color of bromothymol blue in dilute nitric acid?

Yellow


How does this motto go if red touches black you're dead Jack but if red touches yellow you're an okay fellow?

Actually you have it backwards. It goes: If red touches yellow you're a dead fellow, if red touches black, you're OK jack.


What is the yellow part of an egg called?

The yellow part is called the yolk, and if fertilized develops into the embryo.


What is the colour of concentrated nitric acid?

The nitric acid used in laboratory is colorless. The very concentated nitric acid - the fumans acid - with dissolved nitrogen oxides, can release white, red or brown fumes, very corrosive and toxic.


Identify coral snake phrase?

Red touches yellow, kill a fellow. Red touches black, venom lack.


What does a yellow line in the eyes means?

What does a yellow line in the eyes indicate.


When identifying a coral snake what is the key phrase?

"Red and yellow kill a fellow, red and black you'll make it back."That is the most common form of the phrase. Please keep in mind that it only applies to snakes in the United States. If you travel to Mexico, or countries in Central or South America, this rule does NOT apply.Red touches yellow - kill a fellow. Red touches black - venom lack.


What principle of xanthoprotein?

a xanthoprotein is a nitroprotein. The xanthoprotein test is characterisitic reaction of proteins that contain phenyl aromatic function. Nitric acid react with this phenyl group to yellow colored aromatic compound. The yellow stains on the skin from nitric acid exposure is the result of xanthoprotein.