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% $ %



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