The compound NaCN contains both ionic and covalent bonds. Sodium (Na) and Cyanide (CN) are ionically bonded, while the bond between Carbon and Nitrogen within Cyanide is a covalent bond.
The compound that contains both ionic and covalent bonds among the given options is NaCN. This molecule consists of an ionic bond between Sodium (Na) and Cyanide (CN). The Sodium atom gives up its one electron to achieve a stable electron configuration, and this electron enters the valence shell of Cyanide, thus forming an ionic bond. In the Cyanide itself, the bond between Carbon (C) and Nitrogen (N) is a triple covalent bond where they share three electron pairs. Therefore, NaCN exhibits both types of bonds.
Learn more about Ionic and Covalent Bonds