Question

CrO3 dissolves in aqueous NaOH to give :

• A. CrO42–
• B. Cr(OH)3
• C. Cr2 O72–
• D. Cr(OH)2

Answer 1

Answer: (A)

CrO42–

Answer 2

CrO3 is an acidic oxide and reacts with NaOH forming salt.

CrO3 + 2NaOH $\longrightarrow$ Na2CrO4 + H2O.