Which of the following has covalent bond (a) Na2S (b) AlCl3 (c) NaH (d0 MgCl2 Which of the following has covalent bond (a) Na2S (b) AlCl3 (c) NaH (d0 MgCl2 December 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,