Methanides are carbides that decompose in water and generate water; aluminum carbide (Al4C3) and beryllium carbide (Be2C) are examples of this class of carbides. Acetylides are formed from alkali, alkali earth, and lanthanoid metals with the acetylide anion C22-. Lanthanoids also form carbides with the formula M2C3.
Which of the following carbide is a Methanide?
Hence, the correct answer is option (A) i.e. Be2C is a methanide. Note: Here most of the carbides which are given in the option are ionic carbides. These carbides are also known as salt-like or saline carbides. In the group 14 elements aluminium is the only element which forms carbide.
Is Aluminium Carbide a Methanide?
Both aluminium carbide and beryllium carbides are examples of methanides as they have ${{C}^{4-}}$ carbon centres. So, this option is correct.
