Which of the following hydrides is electron-precise hydride?
Correct answer: D. CH4
- A. B2H6
- B. NH3
- C. H2O
- D. CH4
Explanation
Electron-precise hydrides have just enough electrons to form normal single bonds-no shortage, no extra lone pairs. CH₄ has exactly the electrons needed to form four regular C-H bonds. B₂H₆ is electron-deficient, while NH₃ and H₂O are electron-rich (they have lone pairs), so only CH₄ is electron-precise.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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