Step 1: Define molecular hydrides.
Molecular hydrides are covalent hydrides formed between hydrogen and non-metals.
Step 2: Analyze the given compounds.
\(\mathrm{KH}\), \(\mathrm{NaH}\), and \(\mathrm{LiH}\) are ionic hydrides formed with alkali metals.
\(\mathrm{HF}\) is a covalent compound formed between hydrogen and fluorine.
Step 3: Conclusion.
Hence, \(\mathrm{HF}\) is an example of a molecular hydride.