NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- States of Matter
NTA Abhyas 2020 · Chemistry · States of Matter
A mixture of C H _ 4 and C _ 2 H _ 2 occupied a certain volume at a...
A mixture of and occupied a certain volume at a total pressure equal to 63 torr. The same gas mixture was burnt to and alone was collected in the same volume and at the same temperature, the pressure was found to be 69 torr.
What was the mole fraction of in the original gas mixture?
What was the mole fraction of in the original gas mixture?
Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
Let no. of moles of \text{C}{\text{H}_{4} present = mole
Let no. of moles of present = mole
\mathop{{\text{CH}_{4}}_{{n}_{1}} {\text{+2O}_{2} \to \mathop{{\text{CO}_{2}}_{{n}_{1}} {\text{+2H}_{2} \text{O}
\mathop{{C}_{2} {H}_{2}}_{{n}_{2}} \text{+}\dfrac{5}{2} {O}_{2} \to \text{2}\mathop{{\text{CO}_{2}}_{{\text{2n}_{2}} {\text{+H}_{2} \text{O}
Totalno . ofmolesatinitial = {n}_{1} + {n}_{2}
At constant V & T
Alternative solutions
Let no. of moles of present = mole
\mathop{{\text{CH}_{4}}_{{n}_{1}} {\text{+2O}_{2} \to \mathop{{\text{CO}_{2}}_{{n}_{1}} {\text{+2H}_{2} \text{O}
\mathop{{C}_{2} {H}_{2}}_{{n}_{2}} \text{+}\dfrac{5}{2} {O}_{2} \to \text{2}\mathop{{\text{CO}_{2}}_{{\text{2n}_{2}} {\text{+H}_{2} \text{O}
Totalno . ofmolesatinitial = {n}_{1} + {n}_{2}
At constant V & T
Alternative solutions