MCQ
The ion which is isoelectronic to CO is:
- A$O _2^{-}$
- ✓$CN ^{-}$
- C$N _2^{+}$
- D$O _2^{+}$
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$CH _{2} = C = C H - C H _{3}$
$\quad 1\quad \quad 2\quad \quad 3\quad \quad \quad 4$
molecule, the hybridization of carbon $1,2,3$ and $4$ respectively are :
$n$ $l$ $m$
| column $I$ | column $II$ |
| $(A)$ $CO _2( s ) \rightarrow CO _2( g )$ | $(p)$ phase transition |
| $(B)$ $CaCO _3( s ) \rightarrow CaO$ (s) $+ CO _2( g )$ | $(q)$ allotropic change |
| $(C)$ $2 H \bullet \rightarrow H _2( g )$ | $(r)$ $\Delta H$ is positive |
| $(D)$ $P_{\text {(white, solid) }} \rightarrow P_{\text {(red, solid) }}$ | $(s)$ $\Delta S$ is positive |
| $(t)$ $\Delta S$ is negative |
Reason : $Si -O -Si$ linkages are moisture sensitive.