Q96 · CSIR NET Chemistry, December 2016
Paper: CSIR NET December 2016 · Subject: Physical Chemistry · Chapter: Molecular Spectroscopy · Topic: Molecular Spectroscopy – General · Marks: 2 · Difficulty: Medium
Vibrations of diatomic molecules are usually modelled by a harmonic potential. If the potential is given by $x^2$, the correct statement is
(a)Force is $2x$ and force constant is $2$
(b)Force is $-2x$ and force constant is $2$
(c)Force is $2x$ and force constant is $-1$
(d)Force is $-2x$ and force constant is $-1$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
V = x²: F = −dV/dx = −2x; k = d²V/dx² = 2.
Study loop for Molecular Spectroscopy