Question

3.2 moles of hydrogen iodide were heated in a sealed bulb at 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 are.

• A. 2.496
• B. 1.87
• C. 2
• D. 4

Answer 1

Answer: (A)

2.496

Answer 2

$\frac { 22 } { 100 } \times 3.2 = 0.704$

$\therefore$ at equil. moles of HI =3.2–0.704 = 2.496.