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1.which between combination A and combination B is a pore substance
A. combination A because each component retains its properties

B. combination B because when heated,iron sulfide.

C. combination B. because it's component can be separated using a magnet

D. combination B because even if it is heated it will return to its original form

2.which between combination A and B is mixture?
A. combination A because each retains it's property

B. combination B because when heated iron react to sulfur forming iron sulfide

C. combination A Because it's component can be separated using a magnet

D. combination B because even if it is heated it will return to its original form ​