Some Basic Concepts Of Chemistry Question 72
Question: 2g of a mixture of CO and $ CO _2 $ on reaction with excess $ I _2O _5 $ produced 2.54 g of $ I _2 $ . What will be the mass % of $ CO _2 $ in the original mixture?
Options:
A) 35
B) 70
C) 30
D) 60
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ 5CO+I _2O _5\to 5CO _2+I _2 $ Moles of $ I _2O _5=\frac{25.4}{254} $ $ =0.01=0.05molesofCO $ Weight of $ CO=0.05\times 28=1.4g; $ Weight of $ CO _2=2-1.4=0.6g $ Hence % of $ CO _2=\frac{0.6}{2}\times 100=30% $ %
