Which one of the following statements concerning the compounds of Lithium is false?

Options

A. The hydroxide, Carbonate, nitrate, decompose to give the oxide on heating
B. It is the most electronegative among alkali
C. The hydrogen carbonate cannot be isolated as a stable solid
D. It forms a peroxide but not superoxide

Answer

To determine which statement concerning the compounds of Lithium is false, we need to analyze each of the provided statements based on the properties and behavior of Lithium and its compounds.

### Step-by-Step Solution:

1. **Understanding Lithium's Properties:**
- Lithium (Li) is an alkali metal located in Group 1 of the periodic table.
- It has a small atomic size and is more electronegative compared to other alkali metals due to its position in the second period.

2. **Evaluating the Statements:**
- **Statement 1:** "The hydroxide, carbonate, nitrate decompose to give the oxide on heating."
- This statement is true. Lithium hydroxide (LiOH), lithium carbonate (Li2CO3), and lithium nitrate (LiNO3) do decompose upon heating to form lithium oxide (Li2O) along with other products like CO2 and NOx gases.

- **Statement 2:** "It is the most electronegative among alkali metals."
- This statement is also true. Lithium is indeed the most electronegative alkali metal due to its small atomic size.

- **Statement 3:** "The hydrogen carbonate cannot be isolated as a stable solid."
- This statement is true. Lithium hydrogen carbonate (LiHCO3) is not stable and cannot be isolated as a solid due to the small size of lithium, which makes the compound unstable.

- **Statement 4:** "It forms a peroxide but not superoxide."
- This statement is false. Lithium does not form peroxides or superoxides; it primarily forms normal oxides (Li2O). Other alkali metals can form peroxides and superoxides, but lithium is an exception.

3. **Conclusion:**
- The false statement among the options provided is: "It forms a peroxide but not superoxide."

### Final Answer:
The false statement concerning the compounds of Lithium is: "It forms a peroxide but not superoxide."