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NEET levelSingle correct optionDifficulty 1 of 3sc002

The enthalpy of adsorption for chemisorption is typically in the range of:

A $80$ to $240 kJ mo l^{- 1}$
B $20$ to $40 kJ mo l^{- 1}$
C $1$ to $5 kJ mo l^{- 1}$
D $500$ to $1000 kJ mo l^{- 1}$

Answer: A

Chemisorption involves bond formation, so its enthalpy of adsorption is large, about

80

to

240 kJ mo l^{- 1}

. The range

20

to

40 kJ mo l^{- 1}

is typical of physisorption.

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