Question

Identify the correct statements from the following:
(i) In gas phase, the dihedral angle in H₂O₂ is 90.2°
(ii) 50% H₂SO₄ is used in the preparation of H₂O₂ by electrolysis method
(iii) H₂O₂ is used in the synthesis of cephalosporin

• A. i, iii only
• B. ii, iii only
• C. i, ii only
• D. i, ii, iii

Hint:

When evaluating statements involving chemical properties or synthesis processes, ensure to verify details such as bond angles and chemical roles in reactions based on reliable chemical data or sources.

Answer 1

The Correct Option is B

(A) Statement I: The angle mentioned refers to the bond angle in \(H_2O\), which is approximately 104.5°, not 90.2°. Thus, statement I is incorrect.
(B) Statement II: Concentrated \(H_2SO_4\) is indeed used in the preparation of \(H_2O_2\), particularly in processes like the electrolysis of sulfuric acid, which is an older method for producing hydrogen peroxide. Therefore, statement II is correct.
(C) Statement III: \(H_2O_2\) serves as an oxidizing agent in various organic synthesis processes, including the synthesis of cephalosporin antibiotics. Hence, statement III is correct.