Question

Degree of freedom for polyatomic gas is

• A. $\ge 4$
• B. $\ge 5$
  
• C. $\ge 6$
  
• D. $\ge 7$
  

Answer 1

The correct option is C $\ge 6$

A diatomic molecule posses $3$ translational, $2$ rotational and $1$ vibrational degree of freedom which gives a total of $6$ degrees of freedom. A polyatomic gas has more than $2$ atoms in one molecule of it so it must have more than or equal to $6$ degrees of freedom.