Question

In a polar molecule, the ionic charge is $4.8\times {10}^{-10}$ e. s. u. If the inter ionic distance is one $\stackrel{\text{o}}{A}$ 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 $=1\stackrel{\text{o}}{A}={10}^{-10}\text{cm}\text{.}$ 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 $=4.8\text{debye}\text{.}$