JEE MAIN - Chemistry (2005 - No. 32)
Pick out the isoelectronic structure from the following :
$$\eqalign{ & \left( i \right)\,\,\,\,\,\,C{H_3}^ + \cr & \left( {ii} \right)\,\,\,\,{H_3}{O^ + } \cr & \left( {iii} \right)\,\,\,N{H_3} \cr & \left( {iv} \right)\,\,\,\,C{H_3}^ - \cr} $$
$$\eqalign{ & \left( i \right)\,\,\,\,\,\,C{H_3}^ + \cr & \left( {ii} \right)\,\,\,\,{H_3}{O^ + } \cr & \left( {iii} \right)\,\,\,N{H_3} \cr & \left( {iv} \right)\,\,\,\,C{H_3}^ - \cr} $$
$$(i)$$ and $$(ii)$$
$$(iii)$$ and $$(iv)$$
$$(i)$$ and $$(iii)$$
$$(ii), (iii)$$ and $$(iv)$$
Explanation
| Ions | No. of electrons |
|---|---|
| CH3+ | 8 |
| H3O+ | 10 |
| NH3 | 10 |
| CH3- | 10 |
$$\therefore$$ $$\,\,\,$$ $${H_3}{O^ + },N{H_3}$$ and $$C{H_3}^ - $$ are isoelectronic.
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