Q55. A solution containing 10 g of an electrolyte $\mathrm { AB } _ { 2 }$ in 100 g of water boils at $100.52 ^ { \circ } \mathrm { C }$. The degree of ionization of the electrolyte $( \alpha )$ is $\_\_\_\_$ $\times 10 ^ { - 1 }$. (nearest integer) [Given : Molar mass of $\mathrm { AB } _ { 2 } = 200 \mathrm {~g} \mathrm {~mol} ^ { - 1 } , \mathrm {~K} _ { \mathrm { b } }$ (molal boiling point elevation const. of water) $= 0.52 \mathrm {~K} \mathrm {~kg} \mathrm {~mol} ^ { - 1 }$, boiling point of water $= 100 ^ { \circ } \mathrm { C } ; \mathrm { AB } _ { 2 }$ ionises as $\left. \mathrm { AB } _ { 2 } \rightarrow \mathrm {~A} ^ { 2 + } + 2 \mathrm {~B} ^ { - } \right]$