Question

In a polar molecule, the ionic charge is $ 4.8\times {{10}^{-10}} $ e. s. u. If the inter ionic distance is one $ \overset{\text{o}}{\mathop{\text{A}}}\, $ unit, then the dipole moment is

• A. 41.8 debye
• B. 4.18 debye
• C. 4.8 debye
• D. 0.48 debye

Answer 1

Answer: (C)

Given ionic charge $ =4.8\times {{10}^{-10}} $ e. s. u. and ionic distance $ =1\,\overset{\text{o}}{\mathop{\text{A}}}\,={{10}^{-10}}\,\text{cm}\text{.} $ We know that dipole moment = ionic charge $ \times $ ionic distance $ =(4.8\times {{10}^{-10}})\times {{10}^{-8}} $ $ =4.8\times {{10}^{-18}}\, $ e. s. u per cm $ =4.8\,\text{debye}\text{.} $