Question

$I$. A $14.5g$ sample of a compound which contains sulfur and chlorine is found to contain $4.5g$ of sulfur and $10g$ of chlorine. The molecular formula of the compound could be $S{Cl}_2$.
$II$. The mass ratio of sulfur to chlorine in the sample is $1:2$.

• A. Statement $I$ is true, Statement $II$ is true
• B. Statement $I$ is true, Statement $II$ is false
• C. Statement $I$ is false, Statement $II$ is true
• D. Statement $I$ is false, Statement $II$ is false

Answer 1

Answer: (B)

Statement $I$ is true, Statement $II$ is false

Given, mass of sulphur $=4.5g$

Mass of chlorine $=10g$

So, mass ratio $=4.5:10=9:20$ [Statement II is false]

$\Rightarrow$ No. of moles of sulphur $=\frac{4.5}{32}=0.14065moles$

$\Rightarrow$ No. of moles of chlorine$=\frac{10}{35.5}=0.2816moles$

So, moles ratio $=S:Cl=0.14:0.28=1:2$

So, the compound maybe $SC{l}_2$