A) Silica
B) Calcium phosphate
C) Anhydrous aluminium chloride
D) Cobalt naphthenate
Correct Answer: D) Cobalt naphthenate
Explanation: Cobalt naphthenate is the catalyst that is used in commercial method of preparation of phenol.
A) Silica
B) Calcium phosphate
C) Anhydrous aluminium chloride
D) Cobalt naphthenate
Correct Answer: D) Cobalt naphthenate
Explanation: Cobalt naphthenate is the catalyst that is used in commercial method of preparation of phenol.