Question

1. Which kind of materials have lustre, metals or non-metals?
2. Why mustard oil does not mix well with water?
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Answer 1

Answer:

1) Silicon which appears lustorus and show properties os non metal

2) The oil always float on watr because oil is less dense then watr

Answer 2

metals are lustrous but non metals are not except carbon in form of diamond .

mustard oil does not mix well with water because it is  immisible in water .