Aldehydes are less easily oxidised than ketones.

Answer

To determine whether the statement "Aldehydes are less easily oxidized than ketones" is true or false, we can analyze the oxidation reactions of both aldehydes and ketones step by step.

### Step 1: Understanding Aldehydes and Ketones
- **Aldehydes** have the general formula RCHO, where R is a hydrocarbon group.
- **Ketones** have the general formula RC(=O)R', where R and R' are hydrocarbon groups.

### Step 2: Oxidation of Aldehydes
- When aldehydes are oxidized, they typically convert to **carboxylic acids**.
- Common oxidizing agents include concentrated nitric acid (HNO3), potassium permanganate (KMnO4) in acidic conditions, and potassium dichromate (K2Cr2O7).
- The oxidation process involves breaking the C-H bond in the aldehyde, which is relatively easier due to the presence of the hydrogen atom bonded to the carbonyl carbon.

### Step 3: Oxidation of Ketones
- Ketones can also be oxidized, but the process is different. When oxidized, ketones can break the C-C bond adjacent to the carbonyl group, leading to the formation of smaller carboxylic acids.
- According to Popov's rule, the larger alkyl group (R') will remain intact while the smaller alkyl group (R) is oxidized to a carboxylic acid.
- The oxidation of ketones is generally more difficult compared to aldehydes because ketones lack a hydrogen atom directly bonded to the carbonyl carbon, making the C-C bond stronger and more stable.

### Step 4: Comparing the Ease of Oxidation
- Since aldehydes can be oxidized more easily due to the presence of a hydrogen atom bonded to the carbonyl carbon, they are more susceptible to oxidation than ketones.
- In contrast, ketones require breaking a C-C bond, which is a stronger bond and thus requires more energy.

### Conclusion
- Therefore, the statement "Aldehydes are less easily oxidized than ketones" is **false**. Aldehydes are more easily oxidized than ketones.