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8. (B) because D is a non metal and C is a metaloid and A is hydrogen . so B is zinc which is a metal
9.(B) 2 al2o3 + 3C --------- 4 al+ 3 co2
but the problen is carbon cannot dispalce aluminum because al is more reactive than carbon
10.(2) oxygen is broken down
plz mark as BRAINLIST
Q. no 10
2 ) oxygen
Q. no 9
B) aluminum + carbon dioxide
Q. no 8
B) B bcz zinc is a metal