Some Basic Concepts Of Chemistry Question 7
Question: For the reaction $ 2x+3y+4z\to 5w $ Initially if 1 mole of x, 3 moles of y and 4 moles of z is taken. If 1.25 moles of w is obtained then % yield of this reaction is
Options:
A) 50%
B) 60%
C) 70%
D) 40%
Show Answer
Answer:
Correct Answer: A
Solution:
$ 2x+3y+4z\to 5w $
Given moles 1 3 4
Stoichiometric coefficient 2 3 4
Checking for L.R. $ \frac{givenmoles}{stoichiometriccoeffiient}\overset{x}{\mathop{\frac{1}{2}}},\text{ }\overset{y}{\mathop{,\frac{3}{3}=1}}\overset{z}{\mathop{\frac{4}{4}=1}}, $ $ \frac{1}{2}<1 $
$ \therefore xisL.R. $ According to stoichiometry, 2 moles of x yields 5 moles of w. 1 mole of x yield $ \frac{5}{2} $ =2.5 moles of w % yield = $ \frac{Actual,yield}{yield,obtained}\times 100 $ = $ \frac{1.25}{2.5}\times 100=50% $
