Which of the facts regarding kinetic energy (E_k) of 8g O₂, 8g of N₂and 8g CO₂ each at 273 K, is correct ?

• A

  ${\mathrm{E}}_{\mathrm{k}}\left({\mathrm{N}}_2\right)>{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{O}}_2\right)>{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{CO}}_2\right)$

• B

  ${\mathrm{E}}_{\mathrm{k}}\left({\mathrm{N}}_2\right)<{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{O}}_2\right)<{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{CO}}_2\right)$

• C

  ${\mathrm{E}}_{\mathrm{k}}\left({\mathrm{N}}_2\right)={\mathrm{E}}_{\mathrm{k}}\left({\mathrm{O}}_2\right)={\mathrm{E}}_{\mathrm{k}}\left({\mathrm{CO}}_2\right)$

• D

   

  ${\mathrm{E}}_{\mathrm{k}}\left({\mathrm{CO}}_2\right)>{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{N}}_2\right)>{\mathrm{E}}_{\mathrm{k}}\left({\mathrm{O}}_2\right)$