The answer is D because there are different molecules, and you need two or more different things in a compound.
Answer:
(c) Polyatomic
Explanation:
For a mono atomic gas, the specific heat at constant pressure is 5R/2. For a diatomic gas, the specific heat at constant pressure is 7R/2.
Since 11R/2 is larger than both 5R/2 and 7R/2 it cannot be mono atomic or diatomic hence the gas is polyatomic.
R is the gas constant.
The correct answer is option B. A molecule is two or more atoms (same or different) bound together. It is the smallest particle in a chemical element or compound. Molecules are held together by chemical bonds. These bonds are formed by the sharing or transfer of electrons between atoms.