Title 5.SURFACE CHEMISTRY - Questions.pdf ✅

5.SURFACE CHEMISTRY (1.)For adsorption of gas on solid surface, the plots of log x/m vs. log P is linear with a slope equal to : (a.) K (b.) logK (c. ) l/nK (d.) l/n (n being integer) (2.)Which is not correct for catalyst? It : (a.) Enhances the rate of reaction in both directions (b.) Changes enthalpy of reaction (c.) Reduces activation energy of reaction (d.) Specific in nature (3.)The magnitude of colligative properties in all colloidal dispersions is .....than solution : (a.) Higher (b.) Lower(c.) Both (a) and (b) (d.) None of these (4.)Which one is hydrophobic in nature? (a.) Gelatin (b.) Sulphur(c.) Starch (d.) Protein (5.) (a.) Neutralization reaction (b.) Homogeneous catalysis (c.) Heterogeneous catalysis (d.) Irreversible reaction (6.)Decomposition of urea into NH3 and CO2 is followed by the action of enzyme : (a.) Urease (b.) Pepsin(c.) Trypsin (d.) None of these (7.)Adsorption is accompanied by the evolution of heat. So, according to Le-Chatelier principle the amount of substance adsorbed should (a.) Increase with decrease in temperature (b.) Increase with increase in temperature (c.) Decrease with decrease in temperature (d.) Decrease with increase in temperature (8.)Which one of the following equation represents Freundlich adsorption isotherm? (a.) x m = kp (b.) x m = kp n (c. ) log x m = kp n (d.) log x m = kn log p (9.)The number of moles of lead nitrate needed to coagulate 2 moles of colloidal [AgI]I − is (a.) 2 (b.) 1(c.) 1/2 (d.) 2/3 (10.)Surfactant molecules or ions cluster together as micelles which (a.) Due to their hydrophilic tails tend to congregate (b.) Due to their hydrophobic heads provide protection (c.) Are colloid sized clusters of molecules (d.) None of the above (11.)The temperature above which micelle formation occurs is : (a.) Critical temperature (b.) Charles’ temperature (c.) Inversion temperature (d.) Kraft’s temperature (12.)By dividing the catalyst into fine powder there will be increase in (a.) Surface area (b.) Free valancies(c.) Active centres (d.) All of these (13.)Washing soap can be prepared by saponifying alkali with oil of : (a.) Rose oil (b.) Paraffin oil(c.) Ground nut oil (d.) kerosene (14.)Platinum is used as a catalyst in : (a.) Oxidation of ammonia to form nitric acid (b.) Hardening of oils (c.) Production of synthetic rubber (d.) Synthesis of methanol (15.)A colloidal solution always has at least : (a.) One phase (b.) More than two phases (c.) A true solution (d.) Two phases (16.)Milk can be preserved by adding a few drops of : (a.) Formic acid solution (b.) Formaldehyde solution (c.) Acetic acid solution