Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Mix Which of the following facts regarding boron…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Mix Single Correct MCQ
Published on: August 13, 2026

Which of the following facts regarding boron and silicon is true ?

A
Boron is used to make boron steel or boron carbide control rods for nuclear reactor.
B
Boron and silicon form halides which are not hydrolysed.
C
Boron and silicon react with magnesium to form magnesium boride and magnesium silicide which are decomposed by acids to give volatile borane and silane, respectively.
D
Both boron and silicon react with alkali to form borates and silicates containing BO33– and SiO44– tetrahedral units, respectively.

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The correct answer is:
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(a, c, d)

BCl3 + 3H2O H3BO3 + 3HCl ; SiCl4 + 3H2O H2SiO3 + 4HCl

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