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Question

An electric current of 1 amp is passed through acidulated water for 160 minutes and 50 seconds. What is the volume of the hydrogen liberated at the anode (as reduced to NTP)?

A
1.12 litre
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B
2.24 litre
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C
11.2 litre
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D
22.4 litre
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Solution

The correct option is A 1.12 litre
Given Data : 1) Current =I= 1amp
2) Time = t = 160min50sec = 1950sec
We know that,

w = M×I×t2×96500

But,
Number of moles = n = wM = I×t2×96500

n = 1×96502×96500 = 0.05 moles

1 mole of gas at NTP = 22.4l

Hence volume of 0.05 moles of hydrogen liberated = 22.4×0.05 = 1.12l

Hence the correct option is 'A'.

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