COMEDK · Chemistry · 5. States of Matter
Hydrogen diffuses six times faster than gas \(A\). The molar mass of gas \(A\) is
- A 24
- B 36
- C 72
- D 6
Answer & Solution
Correct Answer
(C) 72
Step-by-step Solution
Detailed explanation
Rate of diffusion \(\propto \frac{1}{\sqrt{\text { Molar mass }}}\) \(\therefore \quad \frac{r_{\mathrm{H}}}{r_{\mathrm{A}}}=\sqrt{\frac{M_{\mathrm{A}}}{M_{\mathrm{H}}}}\) \(\because \quad r_{H}=6 r_{A}\) \(\therefore \quad 6=\sqrt{\frac{M_{A}}{2}}\) \(\therefore \quad M_{A}=72\)
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