SURFACE CHEMISTRY(QUIZ-2) 1 / 5 Which of the following statements is true with respect to the types of adsorption? Chemisorption is stronger than physisorption Physisorption is stronger than chemisorption They are both equal They cannot be compared Chemisorption is stronger than physisorption. Chemisorption involves the forming of a chemical bond between the adsorbent and the adsorbate whereas in physisorption, the molecules are held together by weak Van der Waal’s forces. Therefore, chemisorption is stronger. 2 / 5 Which of the following is an example of sorption? Sponge in water Cotton dipped in ink Water on silica gel Oxygen on metal surface Sorption refers to the process where adsorption and absorption occur at the same time. Cotton dipped in ink is one of the cases where both adsorption and absorption, that is, sorption occurs. 3 / 5 Which of the following statements is not true with respect to chemisorption? Depends on nature of adsorbate and adsorbent Has a large heat of adsorption Forms a unimolecular layer Occurs at low temperature Chemisorption is a kind of adsorption that involves a chemical reaction between the adsorbent and adsorbate, resulting in the formation of a chemical bond between the two. Since a bond is to be formed, chemisorption is highly dependent on the reactants(adsorbate and adsorbent) and has a large heat of adsorption. Also, since it involves bond formation, it cannot be multi-layered. Chemisorption is favoured to occur at high temperature. 4 / 5 The formation of micelles takes place only above Inversion temperature Boyle’s temperature Critical temperature Kraft temperature The temperature above which micelles formation takes place is called Kraft temperature. 5 / 5 Collodion is 4% solution of which one of the following in alcohol-ether mixture. Nitroglycerin Cellulose acetate Glycol dinitrate Nitrocellulose Nitrocellulose when dissolved in 4% alcohol-ether mixture is called collodion. Your score isThe average score is 0% 0% Restart quiz
