Alkali metal hydrides react with water to give

Explanation

**Step-by-Step Solution:**

1. **Identify Alkali Metal Hydrides**: Alkali metal hydrides are compounds formed between alkali metals (like lithium, sodium, potassium, etc.) and hydrogen. They can be represented as MH, where M is the alkali metal.

2. **Formation of Alkali Metal Hydrides**: When an alkali metal reacts with hydrogen, it forms an alkali metal hydride. For example, sodium (Na) reacts with hydrogen (H₂) to form sodium hydride (NaH):
\[ 2 \text{Na} + \text{H}_2 \rightarrow 2 \text{NaH} \]
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