Fill in the blanks from the choices given in brackets:
An alkali which completely dissociates into ions is …………….. (ammonium hydroxide, calcium hydroxide, lithium hydroxide)

Explanation

To solve the question, we need to identify which of the given alkalis completely dissociates into ions. The options provided are ammonium hydroxide, calcium hydroxide, and lithium hydroxide.

### Step-by-step Solution:

1. **Identify the Compounds**:
- Ammonium hydroxide (NH4OH)
- Calcium hydroxide (Ca(OH)2)
- Lithium hydroxide (LiOH)
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