@ amresh
metal and non metals can be easily identified in a reaction .
metals have a tendency to accept the electrons generally , but non metal lacks that .
metals are sonorous , ductile and malleable , but non metal is generally non sonorous , and non ductile .
metal are a good conducter of electricity and heat , but in non metal except mercury all are not conducting heat and electricity .
and also u can check the bonding capacity of molecule from which metal and non metal can be distinguished .
HOPE IT CLEARS YOUR DOUBT
ALL THE BEST ..