The bicarbonate of alkali metal which does not exist in the solid state is ………… .

Explanation

To solve the question regarding which bicarbonate of alkali metal does not exist in the solid state, we can follow these steps:

### Step 1: Understand Bicarbonates
Bicarbonates are salts containing the bicarbonate ion (HCO3^-). They are formed from alkali metals and can exist in solid form.

### Step 2: Identify Alkali Metals
The alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs).

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