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Chemistry

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Polly Nitzsche

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Cards in this guide (15)
How do they give alcohol test

by breathing into an alcohol testing unit or blood analysis

What amino acids are found in nitroprusside test

cystine,cysteine,methionin

What is the positive result for sakaguchi test

A red color is the positive result>

What are the principles involved in xanthoproteic test

it is for the identification of aromatic amino acids

Will tyrosine test positive in Hopkins-Cole test

Yes, it is possible (color test).

What is the purpose of Trichloroacetic acid in DNA extraction

Trichloroacetic acid is used for precipitation of the DNA during its extraction.

What is the valency of plumbate

2

What is alcohol test

Alcohol test ( proof ) is the percent of alcohol in drinks.

Predict whether the changes in enthalpy entropy and free energy will be positive or negative for the freezing of water and explain your predictions How does temperature affect the spontaneity

Enthalpy- positive

Entropy- decreasing

Free energy- negative

What is the name of the amino acid responsible for Hopkins-cole reaction test what is the formula of this amino acid

Tryptophan.

What is foulger's reagent

40g urea+ 80ml of 40%H2SO4! add 2g stannous chloride, heat untill solution is clear and make the volume upto 100ml. it is called foulger's reagent!

How would you distinguish between zinc nitrate and calcium nitrate

dissolve both in water and add sulfuric acid to both. in calcium nitrate solution you should expect calcium sulfate as precipitation.

Which one of these starch fat protein and sugar will be a positive result for a bar

PROTEIN

What is guanidine salt

Guanidine is a base. The chemical formula is HNC(NH2)2.

What is the color produced at the point of contact of the two liquids in Hopkins-Cole reaction

This color is purple.

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