Question

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Answer 1

Answer:

(1) C + O2 → CO2

(2) CaO + H2O → Ca(OH)2

CaO = Calcium oxide/Quick Lime

Ca(OH)2 = Calcium hydroxide/Slaked Lime

(3) Pb(NO3)2 + 2KI → 2KNO3 + PbI2

Pb(NO3)2 = Lead nitrate

KI = Potassium iodide

PbI2 = Lead iodide

KNO3 = Potassium nitrate

(4) Zn + CuSO4 → ZnSO4 + Cu

CuSO4 = Copper sulphate

ZnSO4 = Zinc sulphate

Answer 2

1. Carbon burns in air to form Carbon dioxide.

$\boxed{\: \: \sf{C(s) + O2(g) - -> CO2 (g) }}$

• C - Carbon
• O2 - Oxygen
• Co2 - Cabon dioxide

2. calcium oxide react with water to form slaked lime.

$\boxed{\sf{CaO(s) + H2O(l) --> Ca(OH)2}(aq)}$

• CaO - calcium oxide
• H2O - water
• Ca(OH)2 - slaked lime

3. Lead Nitrate with potassium iodide to form lead iodide Potassium Nitrate.

$\boxed{\sf{ Pb(NO3)2 + 2KI --> 2 KNO3 + PbI2}}$

• Pb(NO3) 2 - Lead Nitrate
• KI - potassium iodide
• KNO3 - Potassium Nitrate
• PbI2 - lead iodide

4. zinc react with copper sulphate to form zinc sulphate and copper.

$\boxed{\sf{Zn + CuSO4 --> ZnSO4 + Cu}}$

• Zn - zinc
• CuSO4 - copper sulphate
• ZnSO4 - zinc sulphate
• Cu - copper