MCQ
Incorrect statement is
- ✓Bond form by $s-s$ overlapping is always weakest
- B$SiO_2$ is $3-D$ network solid
- CCoaxial overlapping always produce $\sigma$ bond
- DHybrid orbitals produce $\sigma$ bond
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Statement $(I)$ : $\mathrm{S}_{\mathrm{N}} 2$ reactions are 'stereospecific', indicating that they result in the formation only one stereo-isomers as the product.
Statement $(II)$ : $\mathrm{S}_N 1$ reactions generally result in formation of product as racemic mixtures. In the light of the above statements, choose the correct answer from the options given below :
$(I) HCHO$,
$(II)$ $C{H_3}CHO$,
$(III)$ $C{H_3}COC{H_3}$ is