Question

CO$^{-}$ ion moving with kinetic energy of 20 keV dissociates into O$^{-}$ and C which move along the parent ion direction. Assuming no energy is released during dissociation, the kinetic energies of the daughters $(K.E.)_{O^-}$ and $(K.E.)_C$ are related as}

• A. $(K.E.)_{O^-} = (K.E.)_C$
• B. $(K.E.)_{O^-}/(K.E.)_C = 16/12$
• C. $(K.E.)_{O^-}/(K.E.)_C = 12/16$
• D. $(K.E.)_{O^-}/(K.E.)_C = 16/28$
• E. $(K.E.)_{O^-}/(K.E.)_C = 28/16$

Hint:

For equal momentum, KE $\propto \frac{1}{m}$.

Answer 1

The Correct Option is C