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JEE Main
Exam
JEE Main
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

JEE Main · Chemistry · p Block Elements (Group 13 & 14)

Orthoboric acid when heated to red hot gives:

Orthoboric acid when heated to red hot gives:

Options

  1. Ametaboric acid
  2. Bpyroboric acid
  3. Cboron and water
  4. Ddiboron trioxide

Correct answer

D. diboron trioxide

Step-by-step solution

H3BO3→-H2O\Delta/100oCHBO2→-160oCΔH4B2O7→RedHot>250oCΔB2O3+2H2O{H}_{3} {\text{BO}}_{3} \mathop{→}_{{\text{-H}}_{2} \text{O}}^{{\text{\Delta /100}}^{o} \text{C}} {\text{HBO}}_{2} \mathop{→}_{{\text{-160}}^{o} \text{C}}^{Δ} {H}_{4} {B}_{2} {O}_{7} \mathop{→}_{\text{Red}\text{Hot}\text{>}{\text{250}}^{o} \text{C}}^{Δ} {B}_{2} {O}_{3} {\text{+2H}}_{2} \text{O}
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