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Q.

3.2 moles of hydrogen iodide was heated in a sealed bulb at 4440C till the equilibrium state was reached. Its degree of dissociation at this temperature was found to be 22%. The number of moles of hydrogen iodide present at equilibrium is

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a

2

b

2.496

c

4

d

1.87

answer is A.

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Detailed Solution

α=22100  ×  3.2 = 0.704 (α= degree of dissociation)

∴   at equil. moles of HI = 3.2 - 0.704 = 2.496

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