The conjugate base of $\mathrm{NH}_4^{+}$is

• A

  $\mathrm{NH}^{2-}$
• Correct answer
  B

  $\mathrm{NH}_3$
• C

  $\mathrm{NH}_2^{-}$
• D

  $\mathrm{NH}_4 \mathrm{OH}$

Solution

$\mathrm{NH}_4^{+}$is the conjugate base of $\mathrm{NH}_3 \cdot \mathrm{NH}_4^{+}$is an acid because it will donate $\mathrm{H}^{+}$to the water to become $\mathrm{NH}_3$.

Hence, the correct answer is option: 'B'.