A partially dried clay mineral contains `8%`d water. The original sample contained `12%` water and `45%` sillica.
The `%` if sillica in the partially dried sample is nearly:

Options

A. `50%`
B. `49%`
C. `55%`
D. `47%`

Answer

D

Explanation

`{:("Silica","Water","Clay","Mineral",),(45,12,43,"Initial" %,),(a,8,(92-a)%,"after heating",):}`
The `%` ratio or silica and clay remains constant on heating
i.e.m `(45)/(43)=(a)/(92-a) :. a= 47%`