The molecule active in rotation microwave, infrared absorption as well as rotational Raman spectra is HCl.

Explanation:

- Rotation microwave spectrum: This spectrum arises due to the rotational transitions of molecules between different energy levels. In this spectrum, molecules absorb or emit radiation in the microwave region (1-100 cm-1) when they undergo rotational transitions. HCl exhibits a rotation microwave spectrum due to the presence of a permanent dipole moment (µ) and the ability to rotate freely about its molecular axis.
- Infrared absorption spectrum: This spectrum arises due to the vibrational transitions of molecules between different energy levels. In this spectrum, molecules absorb or emit radiation in the infrared region (4000-400 cm-1) when they undergo vibrational transitions. HCl exhibits an infrared absorption spectrum due to the presence of a polar covalent bond and the ability to vibrate about its bond axis.
- Rotational Raman spectrum: This spectrum arises due to the rotational transitions of molecules between different energy levels. In this spectrum, molecules scatter radiation in the Raman region (100-4000 cm-1) when they undergo rotational transitions. HCl exhibits a rotational Raman spectrum due to the presence of a polarizability (α) and the ability to rotate freely about its molecular axis.

Therefore, the molecule active in rotation microwave, infrared absorption as well as rotational Raman spectra is HCl.