Question

Assertion (A)van der Waals' forces are reponsible for chemisorptions
Reason(R) High temperature is favourable for chemisorptions
The correct answer is

• A. (A) ia false, but (R) is true
• B. Both (A) and (R) are correct and (R) is the correct explanation of A
• C. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
• D. (A) is true, but (R) is false

Answer 1

Answer: (A)

van der Waals' forces are not responsible for chemisorptions. These forces are involved in physisorption. For chemisorptions, high temperature is favourable. It increases with increase of temperature.