Classify the following changes as reversible and irreversible changes.
(a) Burning of candle
(b) Glowing of bulb
(c ) Freezing of water
(d) Curdling of milk
(e) Burning of paper
(f) Magnetization of iron

Explanation

To classify the given changes as reversible or irreversible, we need to understand the definitions of both types of changes:

1. **Reversible Changes**: These are changes that can be reversed, meaning the original substance can be obtained back after the change.
2. **Irreversible Changes**: These are changes that cannot be reversed, meaning the original substance cannot be obtained back after the change.

Now, let's analyze each of the changes listed in the question:

### Step-by-Step Solution:
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