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Question

KI+I2HNO3HIO3+KIO3+NO2
If 3 moles of KI and 2 moles of I2 are mixed with excess HNO3, then volume of NO2 gas evolved at NTP is:

A
716.8 litre
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B
1075.2 litre
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C
44.8 litre
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D
67.2 litre
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Solution

The correct option is B 44.8 litre
according to the equation,
1 mole of KI is reacting with 1 mole of I2
so, for 2 mole of I2 we require 2 mole of KI
so, I2 is the limiting reagent
1 mole of I2 is producing 1 mole of NO2
so, 2 mole of I2 produce 2 moles of NO2
1 mole of gas at NTP = 22.4 L
so, volume of 2 mole of NO2 = 222.4
= 44.8L


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