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Question : 14
Total: 27
(i) What is the role of activated charcoal in gas mask?
(ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the sol represented?
(iii) How does chemisorption vary with temperature?
(ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the sol represented?
(iii) How does chemisorption vary with temperature?
Solution:
(i) Adsorption of toxic gases
(ii)Fe 2 O 3 ⋅ xH 2 O ∕ OH −
(iii) Adsorption is an exothermic process. According to Le Chatelier's principle, at low temperature forward reaction is favourable. As temperature increases enough energy is being provided for the molecules to reach the activation energy.
Therefore, initially as temperature increases, chemisorption increases. As the high temperature helps in bond breaking, after certain temperature, chemisorption decreases.
(ii)
(iii) Adsorption is an exothermic process. According to Le Chatelier's principle, at low temperature forward reaction is favourable. As temperature increases enough energy is being provided for the molecules to reach the activation energy.
Therefore, initially as temperature increases, chemisorption increases. As the high temperature helps in bond breaking, after certain temperature, chemisorption decreases.
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