Write the IUPAC names of the following ketones and aldehydes. Wherever possible, give also common names.
`PhCOPh`

Explanation

To determine the IUPAC and common names for the compound `PhCOPh`, we can follow these steps:

### Step 1: Identify the structure of the compound
The compound `PhCOPh` consists of a carbonyl group (C=O) flanked by two phenyl groups (Ph). This indicates that it is a ketone, as it has two carbon-containing groups attached to the carbonyl carbon.

### Step 2: Determine the parent chain and substituents
In this case, the parent chain is the carbonyl carbon (C=O) bonded to two phenyl groups. Since there are two identical phenyl groups, we can denote them as "diphenyl."

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