MCQ
The conjugate acid of $NH_2^-$ is
- A$NH_4^+$
- ✓$NH_3$
- C$NH_2OH$
- D$N_2H_4$
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$C{H_3} - \mathop {\mathop {CH - }\limits_{|\,\,\,\,\,\,\,} }\limits_{C{H_3}\,} C{H_2} - C{H_2} - Cl$

(At nos. : $L a=57, C e=58, E u=63$ and $Y b=70$ )