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What is the change in color in testing for the presence of protein in egg albumin using solution sodium hydroxide and copper sulfate?
Copper sulphate when mixed with a protein will turn purple if the amount of protein is sufficient enough in quantity to trigger the reaction. Planex1234 says; No offense but i think it is starch that turns dark blue - purple. Thetada says: the colour changes are arguably similar. Iodine solution goes blue/black in the presence of starch. The colour that sodium hydroxide / copper sulphate solution goes in the presence of protein is variously described as mauve / purple.
Why is it more difficult to test for the presence of chloride in organic compounds than in inorganic compounds like HCl?
Testing for chloride in organic compounds is more difficult because organic compounds can contain multiple functional groups and other elements that may interfere with traditional chloride tests. Additionally, the amount of chloride in organic compounds can be lower, making it harder to detect. In contrast, inorganic compounds like HCl contain only chloride ions, simplifying the testing process.
Why did each of the solutions turn iodine blueblack at the start of the experiments?
The presence of starch in the solutions caused them to turn iodine blue-black at the start of the experiments. Iodine forms a dark blue-black complex when it interacts with starch molecules, making it a commonly used indicator to detect the presence of starch in solutions.
Is there always gold in black sand?
Not always. While black sand can contain gold, it is not guaranteed. Large amounts of black sand may indicate a higher likelihood of finding gold, but it still requires proper testing and extraction methods to confirm its presence.
How much quantity of manganous sulphate to be dissolved in water to check the BOD?
The quantity of manganous sulphate added to a water sample for BOD testing is typically around 8 mg per liter of sample. This is used in conjunction with alkaline iodide azide solution to oxidize the organic matter present in the water sample, forming a brown precipitate. The amount of oxygen consumed during this process is then used to calculate the Biological Oxygen Demand (BOD) of the water sample.
What is the tensile strength of 304 stainless steel vs 316 stainless steel?
According to the Metals Handbook of the American Society of Testing and Materials, 316 Stainless has a tensile strength of 85,000 pounds per square inch.
Do you think Tasting is a good way of testing the presence of acids?
tasting is not a good way of testing the presence of acids because some acids could be corrosive such as the sulphuric acid.
What is a famous software testing quote that highlights the importance of thorough testing in the development process?
"Testing shows the presence, not the absence of bugs." - Edsger Dijkstra
Is the visual field testing is performed to determine the presence of cataracts?
False
Is visual field testing performed to determine the presence of cataracts?
no visual field testing is used to determine peripheral vision losses
Would iodine be effective if testing for the presence of lactose?
No, iodine would not be effective for testing the presence of lactose. Iodine is typically used to detect the presence of starch, not lactose. To test for lactose, you would typically use reagents like Benedict's solution or glucose test strips.
What is the testfor testing demineralized water?
Test parameters of Demierallized water are pH, TDS, Conductivity, Total Hardness (Calcium and Magnesium), Chloride, Sulphate like
Is radon gas testing as important as they say?
Radon is a naturally occurring gas which in high concentrations can be extremely hazardous. So it it better to do the testing if you suspect the presence.
Presence of blue or black color indicates the presence of what carbohydrate?
If I am remembering my science classes correctly blue or black coloring indicated the presence of starch.
Which laboratory equipment would most likely be used for testing a substance for the presence of monosaccharides?
A polarimeter or a refractometer would most likely be used for testing a substance for the presence of monosaccharides. These instruments can measure the rotation of polarized light or refractive index, which can help identify the presence of monosaccharides in a solution.
What is the process to chemical testing?
Chemical testing is carried out establish if a specific chemical is present in the sample being tested. The process to chemical testing is the procedure that is followed in order to establish the presence and concentration of a chemical substance.
How do you test for the virus presence?
Testing for virus presence typically involves taking a sample from the individual, such as a swab from the nose or mouth, and analyzing it for the virus's genetic material through a process called RT-PCR. Positive results indicate the presence of the virus, while negative results suggest its absence. Testing protocols and accuracy can vary, so it's important to follow guidelines from health authorities.
