Select the true and false statements:
All the alkalis are bases, but all the bases are not alkalis.

Explanation

To determine the truth of the statement "All alkalis are bases, but all bases are not alkalis," we can break it down step by step.

### Step 1: Define Bases
A base is a substance that can neutralize an acid. This means that bases can react with acids to form water and a salt.

**Hint:** Remember that bases are characterized by their ability to neutralize acids.

### Step 2: Define Alkalis
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