Question

Which of following statements is correct for physisorption?

• A. It involves formation of covalent or ionic bonds.
• B. It is favoured at high temperature.
• C. It is reversible.
• D. It is very specific.

Hint:

Think of physisorption like dust settling on a table—easily removed (reversible), happens anywhere (not specific), and no chemical bonds are formed.

Answer 1

The Correct Option is C

Step 1: Recall what physisorption is.
Physisorption holds the gas to the surface using only weak van der Waals forces. No real bond forms.

Step 2: Use that to judge the options.
Weak forces mean no covalent or ionic bonds, so the bonding option is wrong. It is exothermic, so it likes low temperature, not high. It is also not picky about which gas sticks.

Step 3: Find the true statement.
Because the holding forces are weak, the gas can come off easily again. So physisorption is reversible.
\[ \boxed{\text{It is reversible}} \]