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Anomalous behaviour of oxygen is due to its

Solution & Explanation

### Related Formula \text{Anomalous properties of second-period elements.} ### Core Logic The anomalous properties of oxygen compared to other chalcogens stem directly from its position in the second period of the periodic table. It is characterized by: 1. An exceptionally **small atomic radius**. 2. Highly pronounced **electronegativity**. 3. Complete absence of low-energy valence d-orbitals. ### Step 1: Selection Verification Therefore, the combination of small size and high electronegativity is the correct choice, matching option (3). ### Pattern Recognition All first members of periodic blocks (textN, textO, textF) deviate significantly from their heavier group members due to their high charge density, high electronegativity, and lack of d-orbitals. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Chemistry: p-Block Elements

Reference Study Guides

P Block Elements

More p-Block Elements Previous-Year Questions — Page 6

Q61 jee_main_2024_31_jan_morning Group 18 Elements
Give below are two statements: Statement-I: Noble gases have very high boiling points. Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points. In the light of the above statements, choose the correct answer from the options given below:
  • A. textStatement I is false but Statement II is true.
  • B. textBoth Statement I and Statement II are true.
  • C. textStatement I is true but Statement II is false.
  • D. textBoth Statement I and Statement II are false.

Solution

### Core Logic Statement I and II are False. Noble gases have low boiling points. Noble gases are held together by weak dispersion forces. ### Pattern Recognition Noble gases are characterized by extremely weak intermolecular forces (London dispersion forces) because they are monoatomic and non-polar, which directly results in very low boiling and melting points. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Chemistry: The p-Block Elements
Q79 jee_main_2024_31_jan_morning Group 14 Elements
Consider the oxides of group 14 elements SiO_2, GeO_2, SnO_2, PbO_2, CO and GeO. The amphoteric oxides are
  • A. GeO, GeO_2
  • B. SiO_2, GeO_2
  • C. SnO_2, PbO_2
  • D. SnO_2, CO

Solution

### Core Logic In Group 14 elements, the nature of oxides varies down the group: CO is neutral. CO_2 and SiO_2 are acidic. GeO_2 is distinctly acidic. SnO_2 and PbO_2 are amphoteric. ### Pattern Recognition Tin (Sn) and Lead (Pb) mostly form amphoteric oxides (e.g., SnO, SnO_2, PbO, PbO_2), distinguishing them from the acidic oxides of Carbon and Silicon. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 11 Chemistry: The p-Block Elements

More p-Block Elements Questions — jee_main_2024_29_january_evening

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