Answer:
DNPH - 2,4-Dinitrophenylhydrazine
Explanation:
This is a chemical compound used for quantitative identification of Ketones and Aldehydes in a sample.Since the urine analysis shows positive results for ketone and aldehydes,this is the test for the this. It is usually marked with yellow/orange precipitate(ppt) (dinitrophenylhydrazone).The latter is formed as a results of condensation reaction.
DNPH is a solid compound whose color changes from red to orange, when used to test for the carbonyl groups.Red when pure.
To conduct the test 1-2drops of the sample is dissolved in 2 ml of ethanol.
This should be added to about 3ml of DNPH,and shake severely for the solute and solvents to mixed up.
Usually, a precipitate should formed afterwards.However,if this did not appear, 15 minutes intervals should be observed for the precipitate( yellow or orange ppt) to appear.
The color of the precipitate depends nature of the carbon molecule or hydrocarbons in the sample. Thus, if the sample is aromatic that is unsaturated hydrocarbon e.g benzene red ppt appears, However, if straight hydrocarbon molecules (aliphatic) Orange ppt appears.
D. Should be the answer to your question. If I’m wrong I’m sorry
Answer:
The purpose of this report is to investigate the outcome of different types of food on the body.
Explanation:
Answer:
3. Perishable foods are sold are in only in large quantities.
Explanation:
Its the only reasonable explantion, because all of the other anwser choices are positive connotations.
B. Emphysema
Emphysema, in this condition it causes fragile air sacs to rupture, or stretch out. As this condition begins to progress the lungs begin to lose the ability to absorb oxygen.
