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Boron: Properties & Uses Video Lecture | Chemistry for JEE Main & Advanced

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FAQs on Boron: Properties & Uses Video Lecture - Chemistry for JEE Main & Advanced

1. What are the physical properties of boron?
Ans. Boron is a chemical element with the symbol B and atomic number 5. It is classified as a metalloid and has several unique physical properties. Boron is a hard, brittle, and black solid with a metallic luster. It has a high melting point of 2,300 degrees Celsius and a boiling point of 2,550 degrees Celsius. Boron is also a poor conductor of electricity at room temperature.
2. What are the chemical properties of boron?
Ans. Boron exhibits various chemical properties due to its atomic structure. It readily reacts with oxygen to form boron oxide (B2O3), which is a white solid. Boron can also react with halogens, such as fluorine and chlorine, to form boron halides. Additionally, boron can form compounds with hydrogen, such as boron hydrides. These chemical properties make boron useful in various industrial applications.
3. What are the common uses of boron?
Ans. Boron has a wide range of applications due to its unique properties. It is commonly used in the production of borosilicate glass, which is known for its high heat resistance and low thermal expansion. Boron is also used in the manufacturing of ceramics, such as boron carbide, which is one of the hardest materials known. It is also an essential nutrient for plants and is used in agricultural fertilizers. Boron compounds are also used in the production of flame retardants and as dopants in semiconductors.
4. Is boron toxic to humans?
Ans. Boron is an essential micronutrient for humans, but excessive intake can be toxic. The toxicity of boron depends on the dose and duration of exposure. High levels of boron can cause gastrointestinal symptoms, such as nausea, vomiting, and diarrhea. Prolonged exposure to high levels of boron can lead to kidney damage. It is important to maintain a balanced intake of boron through dietary sources and avoid excessive exposure to boron-containing substances.
5. Can boron be found naturally in the environment?
Ans. Yes, boron is naturally found in the environment. It is relatively abundant in the Earth's crust, with an average concentration of about 10 parts per million. Boron is naturally present in rocks and soil, and it can also be found in water sources, such as rivers and lakes. Plants absorb boron from the soil, and it is an essential nutrient for their growth. Boron can also be released into the environment through human activities, such as industrial processes and the use of boron-containing products.
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