MCQ
Which of the following is different from other three oxides?
- A$MgO$
- B$SnO$
- ✓$ZnO$
- D$PbO$
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$2s$ $2{p_x}$ $2{p_y}$ $2{p_z}$

$(a)$ $R_2SiO$ is repeating unit of linear silicones
$(b)$ $R$ $SiCl_3$ on hydrolysis followed by dehydration gives linear silicones
$(c)$ Silicones can be used as heat insulator
$(d)$ Silica is soluble in $HF$
The correct statement$(s)$ is/are