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Q.

0.8 mole of a mixture of CO and CO2 requires exactly 40 gram of NaOH in solution for complete conversion of all the CO2 into Na2CO3, if the mixture (0.8 mole) is completely oxidised to CO2, find further required moles of NaOH.

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a

0.2

b

0.6

c

1

d

1.5

answer is B.

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Detailed Solution

CO2+2NaOHNa2CO3+H2O
nNaOH=1;
⸫ CO2 present in mixture = 0.5 mol and CO present = (0.8 – 0.5) mol = 3.0 mole
If these 0.3 mol of CO are also oxidized to CO2, then 0.3 mol of CO2 would require 0.6 mol of NaOH.

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