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A cylinder of capacity $20$ litres is filled with ${H_2}$ gas. The total average kinetic energy of translatory motion of its molecules is $1.5 \times {10^5}\,J$. The pressure of hydrogen in the cylinder is
  • A$2 \times {10^6}\,N/{m^2}$
  • B$3 \times {10^6}\,N/{m^2}$
  • C$4 \times {10^6}\,N/{m^2}$
  • D$5 \times {10^6}\,N/{m^2}$
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