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Take a small piece of the chocolate and crush it into fine powder. Put it into a test tube and add a little hydrochloric acid .
Add some water and boil it till the chocolate melts to form a solution.
To the solutions obtained, add ammonium chloride and ammonium hydroxide.
Now take a little amount of the solution and pass hydrogen sulphide gas through it using kipp's apparatus . Formation of a black colour indicates the presence of group four cations.
Now to the filtrate, add small amount of dimethyl glyxime. If a rose red coloured precipitate is obtained in a scarlet red solution, then presence of Nickel (Ni2+) is confirmed.
What else can I help you with?
Sudan III is used to detect the presence of what macromolecules?
Sudan III is used to detect the presence of lipids (specifically triglycerides) in various samples, such as food, blood, and forensic samples. It is commonly used in experiments to visually identify the presence of fats and oils due to its ability to stain lipid-rich substances.
What is scintillation vial used for?
Scintillation vials are used to measure radiation levels or radioactivity in samples. They are often used in radiochemistry, environmental monitoring, and medical research to detect and quantify the presence of radioactive isotopes in various substances.
What are the food tests for starch?
The food test for starch involves adding iodine solution to a sample. If starch is present, the solution will turn blue-black. This test is commonly used in biology and chemistry experiments to detect the presence of starch in various food samples.
How do you detect the presence of adulterants in chilly powder?
Adulterants in chili powder can be detected through various methods such as chemical tests (like testing for the presence of starch or artificial colorants), visual inspection for foreign materials, and using chromatography techniques to identify any added substances. Additionally, comparing the physical characteristics and taste of the chili powder to authentic samples can also help in identifying adulteration.
Why Schultz solution change from colourless to purple with the presence of cellulose?
The Schultz solution changes from colorless to purple in the presence of cellulose due to the formation of a complex between the dye in the solution and the hydroxyl groups present in cellulose. When cellulose is introduced, it interacts with the dye, resulting in a color change that indicates the presence of cellulose. This reaction is often used as a qualitative test for cellulose in various samples.
How can one detect formaldehyde in a given environment?
Formaldehyde can be detected in a given environment using various methods such as air monitoring devices, formaldehyde test kits, or professional laboratory analysis. These methods involve collecting samples from the environment and analyzing them for the presence of formaldehyde.
Is chloroform detected?
Yes, chloroform can be detected using various analytical methods such as gas chromatography (GC) and mass spectrometry (MS). These techniques are sensitive and can identify chloroform in environmental samples, biological fluids, and chemical mixtures. Additionally, specific test kits and methods are available for detecting chloroform in water and air samples.
Sudan III is used to detect the presence of what macromolecules?
Sudan III is used to detect the presence of lipids (specifically triglycerides) in various samples, such as food, blood, and forensic samples. It is commonly used in experiments to visually identify the presence of fats and oils due to its ability to stain lipid-rich substances.
Can we smell petrol?
Yes, petrol has a distinct odor that can be detected by the human nose. The smell of petrol is due to the presence of various chemicals, such as benzene and toluene, which have a strong odor.
Why cannot food poisoning be detected expect in laboratory?
Food poisoning cannot be detected outside of a laboratory because it requires specific tests to identify the pathogens or toxins responsible for the illness. Symptoms like nausea and vomiting are nonspecific and can result from various causes, making it difficult to pinpoint food poisoning without lab analysis. Laboratory tests, such as culturing bacteria or detecting toxins, provide the necessary evidence to confirm the presence of harmful microorganisms in food samples.
How do they do drug testing for cocaine?
They can take samples of your follicles and even give you a cotton swap test. Cocaine can be detected by a urine sample drug test. Interestingly, cocaine can only be detected for a few hours right after being used.
How do you get free food samples?
You can contact the manufacturer and ask if they have samples. I've done this before. There are also several web sites that catalog various free samples, for which you can apply.
What is scintillation vial used for?
Scintillation vials are used to measure radiation levels or radioactivity in samples. They are often used in radiochemistry, environmental monitoring, and medical research to detect and quantify the presence of radioactive isotopes in various substances.
What is diphenylcarbazide?
Diphenylcarbazide is a chemical compound often used in analytical chemistry to detect the presence of chromium. It forms a purple complex with chromium ions, making it useful in colorimetric methods for determining the concentration of chromium in various samples.
What sort of products are available from Sees Candy company?
Many products are available from the Sees Candy company. These include various chocolates, including raspberry, mint, milk, white and dark chocolates.
What are the food tests for starch?
The food test for starch involves adding iodine solution to a sample. If starch is present, the solution will turn blue-black. This test is commonly used in biology and chemistry experiments to detect the presence of starch in various food samples.
How is the presence of virus detected?
The presence of a virus can be detected using various methods, including polymerase chain reaction (PCR) testing, which amplifies viral genetic material to identify its presence. Other techniques include serological tests that detect antibodies produced in response to a viral infection, and antigen tests that identify specific viral proteins. Additionally, viral culture methods can be employed to grow the virus in a laboratory setting for identification. Each method has its own advantages and is chosen based on the type of virus and the stage of infection.
