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NTA Abhyas NEET2020Chemistryp Block Elements (Group 13 & 14)Practice

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

H 3 BO 3 → -H 2 O Δ/100 o C HBO 2 → -160 o C Δ H 4 B 2 O 7 → Red   Hot    >   250 o   C Δ B 2 O 3   +2H 2 O

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