Question

Microcosmic salt bead test of salt $\left(X\right)$ yields semi-translucent mass. Therefore it contains

• A. $Co\left(\left(N O\right)_{3}\right)_{2}$
• B. $Ca\left(\left(N O\right)_{3}\right)_{2}$
• C. $C u S O_{4}$
• D. $M n S O_{4}$

Answer 1

Answer: (B)

Silica is not dissolved by the phosphate bead. When a silicate salt is strongly heated in the bead, silica is liberated and this remain suspended in the bead in the form of semi-translucent mass.

$C a S i O_{3}+N a P O_{3} \rightarrow \, N a C a P O_{4}+S i O_{2}$