Iodine (iodine-potassium iodide) staining distinguishes starch ( a polysaccharide) from monosaccharides, a disaccharides and other polysaccharides. Therefore, a bluish black color is a positive test for starch, and a yellow-ish brown color ( no color change) is a negative test for starch.
You are given two beakers, distilled water, two hot plates, two thermometers and salt. These materials are enough in order to test the effect of salt in the boiling point water. To do this, you set up two beakers. In one of the beakers, you add pure distilled water and nothing else. For the other beaker, you put a solution of salt and water. You place these beakers on separate hot plates and place inside the beakers the thermometers. You heat these substances until they boil and then you measure the boiling points of the substances. You would observe that the boiling point of the solution would have a higher boiling point than the pure liquid.
Answer:
TRUE
Explanation:
People in United States especially the young people consumes more alcohol than any other drugs in the world. According to a report, about 24 millions of people over the age 18 consumes an average of 74 alcoholic drinks in a week. In the United States, they use it more as a recreational drug other than tobacco or certain illicit drugs.
Hence the answer is TRUE.
Answer:
Zn(s)+ 2 HCl(aq)➡️ ZnCl2 (aq) + H2(g)
Explanation:
Your chemical equation can be simplified....
