Question:
Which of the following statements regarding the similarities between boron and silicon is not correct?
Which of the following statements regarding the similarities between boron and silicon is not correct?
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Boron forms \textbf{electron-deficient hydrides} (boranes), whereas carbon forms electron-precise hydrides. This is an important distinction in \(p\)-block chemistry.
Updated On: Jul 9, 2026
- Both form halides that undergo hydrolysis
- Both form electron precise hydrides
- Both form acidic oxides
- Density of both is almost same \bigskip
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The Correct Option is B
Solution and Explanation
Concept:
Boron and silicon exhibit a diagonal relationship and therefore possess several similar chemical properties.
Step 1: Analyse each statement.
• Both form halides that undergo hydrolysis (e.g., \(\mathrm{BCl_3}\) and \(\mathrm{SiCl_4}\)). \checkmark
• Boron forms electron-deficient hydrides (boranes), not electron-precise hydrides. Silicon forms hydrides such as silanes. Hence this statement is incorrect. \(\times\)
• Both form acidic oxides (\(\mathrm{B_2O_3}\) and \(\mathrm{SiO_2}\)). \checkmark
• Their densities are nearly comparable among diagonal elements. \checkmark
Step 2: Final conclusion. The incorrect statement is \[ \boxed{\text{Both form electron precise hydrides}.} \] Hence, the correct option is \(\boxed{(B)}\).
Step 1: Analyse each statement.
• Both form halides that undergo hydrolysis (e.g., \(\mathrm{BCl_3}\) and \(\mathrm{SiCl_4}\)). \checkmark
• Boron forms electron-deficient hydrides (boranes), not electron-precise hydrides. Silicon forms hydrides such as silanes. Hence this statement is incorrect. \(\times\)
• Both form acidic oxides (\(\mathrm{B_2O_3}\) and \(\mathrm{SiO_2}\)). \checkmark
• Their densities are nearly comparable among diagonal elements. \checkmark
Step 2: Final conclusion. The incorrect statement is \[ \boxed{\text{Both form electron precise hydrides}.} \] Hence, the correct option is \(\boxed{(B)}\).
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