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Z M A g → Z - 4 M - 8 B g + ( α -particles) ( α - particles are helium nuclei, so will form helium gas by trapping electron(s)). The radioactive disintegration follows first order kinetics starting with 1 mol of A in a 1-litre closed flask at 27 ° C pressure developed after two half lives is approximately

Options

  1. A24 atm
  2. B65 atm
  3. C61.5 atm
  4. D12 atm

Correct answer

C. 61.5 atm

Step-by-step solution

P V = n R T P = 5 2 × 0.082 × 300 1 a t m P = 61.5 atm

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