2KClO3GIVES RISE TO KCl+o2
here kcl is
hard
brittle
soft and waxy
mallaeble and ductile
ans brittle
BUT IT CAN BE HARD TOO ,RIGHT?AS IT IS IONIC

Dear Student,

KCl i.e. potassium chloride is a metal halide. It is an ionic compound and therefore can be hard as well as brittle . They are hard due to the presence of strong ionic bonds in the compound. 
They are brittle as the particles are arranged in an orderly manner.
 

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