Assertion: Gases are easily adsorbed on the surface of metals, especially transition metals.
Reason: Transition metals have free valencies

Options

A. If both (`A`) and (`R`) are correct and (`R`) is the correct explanation of (`A`).
B. If both (`A`) and (`R`) are correct, but (`R`) is not the correct explanation of (`A`).
C. If (`A`) is correct, but (`R`) is incorrect.
D. If (`A`) is incorrect, but (`R`) is correct.

Answer

A, B, C, D

Explanation

Because of free valencies of transition metal, gases easily gets abosorbed on the surface of metal.