State one relevant observation for the reaction
Zinc carbonate is heated strongly.

Explanation

To answer the question regarding the observation for the reaction when zinc carbonate is heated strongly, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactant**: The reactant in this reaction is zinc carbonate (ZnCO₃), which is a white powdery solid.

2. **Heating the Reactant**: When zinc carbonate is heated strongly, it undergoes thermal decomposition. This means that it breaks down into simpler substances due to the heat.

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