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PPT: p-block Elements
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FAQs on PPT: p-block Elements
| 1. What are p-block elements and which groups do they cover in the periodic table? |  |
Ans. P-block elements occupy groups 13 to 18 of the periodic table, characterised by filling p-orbitals as their valence electrons. These include boron family, carbon family, nitrogen family, oxygen family, halogens, and noble gases. P-block elements exhibit diverse properties ranging from non-metals to metalloids and metals, making them chemically varied and significant in NEET Chemistry.
| 2. Why do halogens have such high electronegativity compared to other p-block elements? | |
Ans. Halogens possess the highest electronegativity among p-block elements because they have seven valence electrons and require only one more electron to achieve a stable octet configuration. Their small atomic radius combined with high effective nuclear charge creates strong attraction for electrons. This makes fluorine the most electronegative element overall, with electronegativity decreasing down the halogen group.
| 3. What's the difference between the chemical properties of noble gases and reactive halogens? | |
Ans. Noble gases have completely filled p-orbitals (eight valence electrons), making them extremely stable and chemically inert with minimal reactivity. Halogens, conversely, have seven valence electrons and readily gain one electron to complete their octet, exhibiting high chemical reactivity. This fundamental difference in electron configuration explains why halogens form compounds easily while noble gases remain unreactive under normal conditions.
| 4. How do oxidation states vary across the nitrogen family in p-block elements? | |
Ans. The nitrogen family (group 15) exhibits oxidation states ranging from -3 to +5, with nitrogen showing -3 (in ammonia), +3 (in nitrogen oxides), and +5 (in nitric acid). Phosphorus typically displays -3, +3, and +5 states, whilst heavier elements like arsenic and antimony preferentially show +3 and +5. This variability in oxidation states reflects their position in the p-block and increases down the group.
| 5. Why is the inert pair effect important when studying heavier p-block elements like lead and tin? | |
Ans. The inert pair effect describes the reluctance of the outermost s-electrons in heavier p-block elements to participate in bonding, causing them to prefer lower oxidation states. Lead typically exhibits +2 oxidation state rather than expected +4, and tin shows both +2 and +4. This phenomenon becomes increasingly significant down the p-block and explains anomalous chemical behaviour in elements like bismuth and polonium, crucial for NEET exam preparation.
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Document Description: PPT: p-block Elements for NEET 2026 is part of Chemistry Class 12 preparation. The notes and questions for PPT: p-block Elements have been prepared according to the NEET exam syllabus. Information about PPT: p-block Elements covers topics like and PPT: p-block Elements Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: p-block Elements.
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