NEET Exam > NEET Notes > Chemistry Class 11 > Question Bank (Solutions): The p-Block Elements
Question Bank (Solutions): The p-Block Elements | Chemistry Class 11 - NEET PDF Download
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FAQs on Question Bank (Solutions): The p-Block Elements - Chemistry Class 11 - NEET
| 1. What are the general properties of p-block elements? |  |
Ans. P-block elements are characterized by having their outermost electrons in the p orbital. They include groups 13 to 18 of the periodic table. These elements exhibit a wide variety of physical and chemical properties. Generally, they have higher electronegativities compared to s-block elements, show variable oxidation states, and can form covalent bonds. They also include metals, metalloids, and nonmetals, leading to a diverse range of reactivity and behavior.
| 2. What are the common oxidation states of p-block elements? | |
Ans. P-block elements commonly exhibit multiple oxidation states due to their ability to lose or gain electrons from their p and s orbitals. For instance, Group 13 elements like aluminum typically show +3 oxidation state, while Group 14 elements like carbon can display oxidation states of -4, +2, and +4. Additionally, elements in Group 15 can show oxidation states of -3, +3, and +5. The presence of d-orbitals in heavier elements also allows for additional oxidation states.
| 3. How do the properties of p-block elements vary across periods? | |
Ans. As you move across a period from left to right in the p-block, the atomic size decreases due to increased nuclear charge, which pulls the electrons closer to the nucleus. This trend affects the ionization energy and electronegativity, both of which generally increase across a period. For example, the metallic character decreases while nonmetallic character increases. Additionally, the reactivity of nonmetals tends to increase as you move from left to right.
| 4. What are some important compounds formed by p-block elements? | |
Ans. P-block elements form a variety of important compounds. For example, nitrogen (N) forms ammonia (NH₃) and nitric acid (HNO₃), while phosphorus (P) is known for phosphoric acid (H₃PO₄) and phosphine (PH₃). Additionally, halogens (Group 17) form compounds such as hydrogen chloride (HCl) and sodium fluoride (NaF). These compounds play crucial roles in biological processes, industrial applications, and everyday life.
| 5. What is the significance of the p-block elements in everyday life? | |
Ans. P-block elements are vital for various aspects of everyday life. They play essential roles in biological systems, such as nitrogen in proteins and phosphorus in DNA. In industry, elements like silicon are key components in electronics and solar cells, while halogens are used in disinfection and pharmaceuticals. Additionally, many p-block compounds are used in agriculture as fertilizers, pesticides, and herbicides, highlighting their importance in food production and environmental management.
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Dec 22, 2024 Last updated |
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