The Solvay process for manufacturing sodium carbonate (Na₂CO₃) involves the key step:
ADirect combination of Na₂O and CO₂
BPassing CO₂ and NH₃ into saturated NaCl solution
CElectrolysis of molten NaCl
DNeutralisation of NaOH with CO₂
Question 2
The Ostwald process for manufacturing nitric acid (HNO₃) involves catalytic oxidation of ammonia. The key steps are:
AN₂ + O₂ → 2NO (direct combination at 2000°C)
B4NH₃ + 5O₂ → 4NO + 6H₂O
CNH₃ + HCl → NH₄Cl → HNO₃ by exchange
DElectrolysis of aqueous NH₄NO₃
Question 3
Nuclear fission of U-235 is triggered by:
AFast neutrons with kinetic energy > 1 MeV
BSlow (thermal) neutrons
CAlpha particles bombarding the nucleus
DGamma radiation hitting the nucleus
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