The position of equilibrium lies to the right in each of these reactions:
$N_2H_5^+ + NH_3 \rightleftharpoons NH_4^+ + N_2H_4$
$NH_3 + HBr \rightleftharpoons NH_4^+ + Br^{-}$
$N_2H_4 + HBr \rightleftharpoons N_2H_5^+ + Br^{-}$
Based on this information,what is the order of acidic strength?

  • A
    $HBr > N_2H_5^+ > NH_4^+$
  • B
    $N_2H_5^+ > N_2H_4 > NH_4^+$
  • C
    $NH_3 > N_2H_4 > Br^{-}$
  • D
    $N_2H_5^+ > HBr > NH_4^+$

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