A neutron collies head-on with a stationary hydrogen atom in ground state. Which of the following statements is/are correct ?

Options

A. (a)If kinetic energy of the neutron is less than `13.6 eV` collision must be elastic
B. (b)If kinetic enegfy of the neutron is less than `13.6 eV` collision must be inelastic
C. (c)Inelastic collision may be take place only when initial kinetic energy iof neutron is greater than `20.4 eV`
D. (d)Perfectly inelcastic collision can not take place

Answer

A, C

Explanation

`K ge 20.4 eV` for inelastic collision