The heat evolved in chemisorption lies in the range (in \( \mathrm{kJ} / \mathrm{mol} \) ) of : ...

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The heat evolved in chemisorption lies in the range (in \( \mathrm{kJ} / \mathrm{mol} \) ) of :
(a) 80 to 240
(b) 20 to 40
(c) 40 to 80
(d) 20 to 100
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