Question

The formula of hydrogen phosphate of a metal M is MHPO${}_4$. Give the formula of metal chloride.

• A. $MCl$
• B. $MC{l}_3$
• C. $MC{l}_2$
• D. $M_2$Cl

Answer 1

The correct option is C $MC{l}_2$

$MHP{O}_4$ is derived from the acid $H_{3}P{O}_4$ . Thus the metal $M$ replaced two hydrogen atoms of hydrogen phosphate. So, its valency is $2.$ Hence the formula of the metal chloride is $MC{l}_2$ . (Because the valency of$M$ is $2$ and the valency of$Cl$ is $1$