X2S3
X2(NO3)3
XCl3
Element X forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be:
Element M forms a chloride with the formula MCl2 which is a solid with high melting point. M would most likely be in the group in which .................. is placed.
[(a) Na (b) Mg (c) Al (d) Si. ]