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46. The group of substances in which at melting point covalent bond becomes weak:- (1) NaCl, KCl, CaCl2 (2) I2(s), CH4(s), dry ice (3) B4C, diamond,SiC (4) All of the above

Answer» 46. The group of substances in which at melting point covalent bond becomes weak:- (1) NaCl, KCl, CaCl2 (2) I2(s), CH4(s), dry ice (3) B4C, diamond,SiC (4) All of the above


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