Identify physical and chemical changes among the following.
(a) Boiling of milk
(b) Ripening of fruits
(c ) Curding of milk
(d) Melting of candle
(e ) Rusting of iron
(f) Blackening of silverware

Explanation

To classify the given changes as physical or chemical, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Physical Change**: A change that alters the form or appearance of a substance but does not change its chemical composition. These changes are usually reversible.
- **Chemical Change**: A change that results in the formation of new chemical substances. These changes are usually irreversible.

...