If $H_2S$ and $NH_3$ gases are released simultaneously from a cylinder through a small hole,which gas will be detected first and why?

  • A
    $H_2S$ will be detected first because it is heavier.
  • B
    $NH_3$ will be detected first because it is lighter.
  • C
    Both will be detected at the same time.
  • D
    None of the above.

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