Hardest Trivia Chemistry Practice Test!

Barbituric acid is used as a tranquillizer because it acts as a central nervous system depressant, producing a calming and sedative effect. It can be used to treat anxiety, insomnia, and seizures.

Tranquillizers are a class of drugs commonly used to treat stress and anxiety. They work by affecting the chemicals in the brain that may become unbalanced during times of stress, helping to promote a sense of calm and relaxation. These medications can help to reduce symptoms such as restlessness, irritability, and difficulty sleeping that are often associated with stress. Therefore, tranquillizers are the correct class of drugs used for the treatment of stress.

Dettol is a mixture of terpeneol and chloroxylenol. Chloroxylenol is a chemical compound that is commonly used as an antiseptic and disinfectant. It has antimicrobial properties and is effective against a wide range of bacteria and viruses. When combined with terpeneol, which is a natural compound found in many essential oils, Dettol is able to provide effective cleaning and disinfection. Chloroxylenol helps to kill germs and prevent the spread of infections, making it an important ingredient in Dettol.

Artificial sweeteners are sugar substitutes that are used to provide sweetness to food and beverages without adding calories. Saccharin, Altame, and Sucralose are all examples of artificial sweeteners. Therefore, the correct answer is "All of these" as all three options mentioned in the question are types of artificial sweeteners.

Acetylsalicylic acid is the correct answer because it is the chemical name for aspirin. Aspirin is a commonly used medication that is used to relieve pain, reduce inflammation, and lower fever. It belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). Acetylsalicylic acid works by inhibiting the production of certain chemicals in the body that cause pain and inflammation. It is a widely available and widely used over-the-counter medication.

Phosphate in detergent powder acts as a water softener by removing Ca2+ and Mg2+ ions from the water. These ions are responsible for making water hard, which can lead to various issues such as soap scum, reduced lathering, and decreased cleaning efficiency. By removing these ions, phosphate helps to prevent these problems and allows the detergent to work more effectively in cleaning fabrics.

KMnO4 is used as an antiseptic because it has strong oxidizing properties. It can react with organic compounds and kill bacteria, fungi, and viruses. KMnO4 is commonly used as a disinfectant for wounds and as a cleaning agent for surfaces. It is able to kill microorganisms by oxidizing their cell membranes and disrupting their cellular processes. Additionally, KMnO4 has a purple color, which makes it easy to identify and track its application.

Sorbic acid and propionic acid salts are commonly used as food preservatives. These salts help to prevent the growth of bacteria, molds, and yeasts in food, thereby extending its shelf life. By inhibiting the growth of these microorganisms, food preservatives help to maintain the quality and safety of food products.

Tincture iodine is an alcoholic solution of I2. This means that iodine (I2) is dissolved in alcohol, typically ethanol. This solution is commonly used as an antiseptic to disinfect wounds and prevent infection. The alcohol helps to dissolve the iodine and allows for easy application to the affected area.

2-Acetoxy benzoic acid is used as both an analgesic and antipyretic. Analgesics are substances that relieve pain, while antipyretics are substances that reduce fever. Therefore, 2-Acetoxy benzoic acid can be used to alleviate pain and reduce fever, making it useful for both purposes.

Sucralose is the correct answer because it is an artificial sweetener that contains chlorine, has the appearance and taste similar to sugar, and is stable at cooking temperature. Aspartame and saccharin are other artificial sweeteners, but they do not contain chlorine. Alitame is not mentioned in the question and therefore cannot be the correct answer.

Aspirin contains the carbonyl functional group (―COOH) in its structure. The presence of this functional group allows aspirin to act as an analgesic, anti-inflammatory, and antipyretic drug. It is used to relieve pain, reduce inflammation, and lower fever. Aspirin's carbonyl group plays a crucial role in its mechanism of action by inhibiting the production of prostaglandins, which are involved in pain and inflammation pathways.

Cetyltrimethylammonium bromide is the organic detergent used in hair conditioners. This compound is a quaternary ammonium salt with a long hydrophobic tail and a positively charged head. It acts as a surfactant, helping to remove dirt and oil from the hair while also providing conditioning properties. Cetyltrimethylammonium bromide is commonly used in hair care products due to its ability to improve manageability, reduce frizz, and enhance shine.

Phenyl salicylate is an ester that is commonly used in medicine. It is often used as an ingredient in topical analgesics and skin care products due to its anti-inflammatory and pain-relieving properties. Additionally, phenyl salicylate is also used as a fragrance ingredient in various cosmetic and personal care products. Its ester structure allows it to be easily absorbed into the skin, making it an effective ingredient for topical applications.

Benzene is a nonpolar compound, meaning it does not readily dissolve in water, which is a polar solvent. However, certain substances called surfactants can disperse benzene in water by reducing the surface tension between the two substances. Surfactants have both hydrophilic (water-loving) and hydrophobic (water-repelling) properties, allowing them to create micelles or emulsions that can solubilize benzene in water to some extent. Therefore, the correct answer would be a surfactant or an emulsifying agent.