MCQ
Consider following statements
$(a)$ $R_2SiO$ 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
- A$a, b, c$ and $d$
- ✓$a, c$ and $d$
- C$a, b$ and $d$
- D$a$ and $c$