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Consider a hypothetical situation where we are comparing the properties of two crystals made of atom `A` and atom `B`. Potential energy `(U) v//s` interatomic separation (r) graph for atom `A` and atom `B` is shown in figure (i) and (ii) and respectively.

Choose correct statement

A

Volume of `A` and `B` expand on heating

B

Volume of `A` and `B` contract on heating

C

`A` expands on heating and `B` contracts on heating

D

`A` contracts on heating and `B` expands on heating

Text Solution

Verified by Experts

The correct Answer is:
C
On increasing temperature (giving heat) , `U` increases. Now `r_(avg)` increases for `A` while decreases for `B`.
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