Question

3 g of an oxide of a metal is converted to chloride completely and it yields 5 g chloride. The equivalent weight of metal is:

• A. 33.25
• B. 3.325
• C. 12
• D. 20

Answer 1

Answer: (A)

33.25

As we know that,

$\text{Gram eq.}=\frac{\text{wt.}}{\text{eq. wt.}}$

$\therefore {\left(\text{gram eq.}\right)}_{M/O^{-2}}={\left(\text{gram eq.}\right)}_{M/{Cl}^{-}}$

$\frac{3}{E_M+E_{O^{2-}}}=\frac{5}{E_M+E_{{Cl}^{-}}}$

$\frac{3}{E_M+8}=\frac{5}{E_M+35.5}$

$\Rightarrow 3E_M+106.5=5E_M+40$

$\Rightarrow 2E_M=106.5-40$

$\Rightarrow E_M=\frac{66.5}{2}=33.25$

Hence, the correct option is $\text{A}$