Answer:
2HBr(g) → H₂ (g) + Br₂ (g)
2Al + Fe₂O₃ → 2Fe + Al₂O₃
2C₄H₆ + 11O₂ → 8CO₂ + 6H₂O
Ag + Pb₃(PO₄)₂ → No reaction
K₂CO₃ + Cal₂ → 2KI + CaCO₃
Step-by-step explanation:
1st reaction:
2HBr(g) → H₂ (g) + Br₂ (g)
HBr produces hydrogen and bromine gas.
Second reaction:
2Al + Fe₂O₃ → 2Fe + Al₂O₃
Aluminium is more reactive than iron that's why it displace the iron from oxide and form aluminium oxide.
3rd reaction:
2C₄H₆ + 11O₂ → 8CO₂ + 6H₂O
Butyne burn in the presence of oxygen and produces carbondioxide and water.
4th reaction:
Ag + Pb₃(PO₄)₂ → No reaction
Because lead is more more reactive than silver that's why silver can not displace the lead to react with (PO₄)₂ .
5th reaction:
K₂CO₃ + Cal₂ → 2KI + CaCO₃
potassium carbonate react with calcium iodide and produces calcium carbonate and potassium iodide.