which of these will definitely result in chemical change?
a) Burning
b) Mixing
c)Melting
d) Heating

Dear student,    
​Please find below the solution to the asked query                                                               

Burning will definitely result in chemical change. e.g. burning of sulphur to produce sulphur dioxide, burning of paper to produce ashes etc.
Hence, option (a) is correct.
​       
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