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FAQs on Revision Notes: p-Block Elements - Chemistry Class 12 - NEET

1. What are p-block elements?
Ans. p-block elements are a group of elements in the periodic table that belong to groups 13 to 18. They are located in the p-block of the periodic table and include elements such as boron, carbon, nitrogen, oxygen, fluorine, and many others.
2. How many valence electrons do p-block elements have?
Ans. The number of valence electrons in p-block elements varies depending on the group they belong to. Group 13 elements have 3 valence electrons, Group 14 elements have 4 valence electrons, Group 15 elements have 5 valence electrons, Group 16 elements have 6 valence electrons, Group 17 elements have 7 valence electrons, and Group 18 elements have 8 valence electrons.
3. What are the properties of p-block elements?
Ans. P-block elements have diverse properties due to the presence of both metals and nonmetals within this group. Some common properties include: - P-block elements are often involved in covalent bonding. - They can form multiple oxidation states. - P-block elements can exhibit both metallic and nonmetallic properties. - They show a wide range of reactivity and can participate in various chemical reactions.
4. How are p-block elements used in everyday life?
Ans. P-block elements have numerous applications in everyday life. Some examples include: - Carbon (C) is a key element in organic compounds, making it essential for life and the foundation of many chemicals and materials. - Nitrogen (N) is used in the production of fertilizers and explosives. - Oxygen (O) is vital for respiration and is used in various industrial processes. - Silicon (Si) is widely used in electronics and semiconductor devices.
5. What are the environmental effects of p-block elements?
Ans. Some p-block elements can have significant environmental effects. For example: - Mercury (Hg) is a toxic element that can contaminate water sources and bioaccumulate in the food chain, posing a risk to human health and the environment. - Lead (Pb) is known for its harmful effects on the nervous system and can be found in old paint, water pipes, and certain industrial processes. - Arsenic (As) is a naturally occurring element that can contaminate groundwater, leading to serious health risks when consumed by humans or animals.
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