Surface Chemistry PYQs Set 8 (PDF)

Set 8 of 8 · Questions 211-227 of 227

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Mere Teacher · Previous Year Questions NEET Chemistry · Surface Chemistry · Set 8 (Q211-227)
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211. $A plot of log (x / m) versus log (p) for adsorption of a gas on a solid gives a straight line with a slope of$ (1) $- log k$ (2) $log (1/ n)$ (3) $\frac{1}{n}$ (4) $antilog (1/ n)$ 212. $Which of the following colloids is not a gel?$ (1) $Cheese$ (2) $Butter$ (3) $Milk$ (4) $Jellies$ 213. $When FeCl_{3} is added to excess of hot water gives a sol ' X'. When FeCl_{3} is added to NaOH_{(aq)} solution, gives sol ' Y'. X and Y formed in the above processes respectively are$ (1) $Fe2O3\cdotxH2O/OH-and Fe_{2} O_{3} \cdot x H_{2} O / Fe^{3 +}$ (2) $Fe_{2} O_{3} \cdot x H_{2} O / H^{+} and Fe_{2} O_{3} \cdot x H_{2} O / Na^{+}$ (3) $Fe_{2} O_{3} \cdot x H_{2} O / Cl^{-} and Fe_{2} O_{3} \cdot x H_{2} O / OH^{-}$ (4) $Fe_{2} O_{3} \cdot x H_{2} O / Fe^{3 +} and Fe_{2} O_{3} \cdot x H_{2} O / OH^{-}$ 214. $Given Gas H_{2} C H_{4} C O_{2} S O_{2} Critical 33 190 304 630 Temperature / K On the basis of data given above, predict which of the following gases shows least adsorption on a definite amount of charcoal?$ (1) $C H_{4}$ (2) $H_{2}$ (3) $C O_{2}$ (4) $S O_{2}$ 215. $Which one of the following enzymes converts proteins into amino acids?$ (1) $Maltase$ (2) $Pepsin$ (3) $Trypsin$ (4) $Zymase$ 216. $Which of the following does not show Tyndall effect?$ (1) $Clouds$ (2) $Milk$ (3) $Sugar solution$ (4) $Suspension$ 217. $The enzyme which converts maltose to glucose is$ (1) $maltase$ (2) $lysine$ (3) $insulin$ (4) $zymase.$ 218. $The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called$ (1) $maltase$ (2) $lipase$ (3) $zymase$ (4) $pepsin.$ 219. $Which one of the following forms micelles in aqueous solution above certain concentration?$ (1) $Dodecyl trimethyl ammonium chloride$ (2) $Glucose$ (3) $Urea$ (4) $Pyridinium chloride$ 220. $For the conversion of oxygen to ozone in the atmosphere, nitric oxide in gaseous phase acts as$ (1) $enzyme catalyst$ (2) $homogeneous catalyst$ (3) $heterogeneous catalyst$ 221. $The Tyndall effect is observed only when following conditions are satisfied(A) The diameter of the dispersed particles is much smaller than the wavelength of the light used.(B) The diameter of the dispersed particles is not much smaller than the wavelength of the light used(C) The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.(D) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.$ (1) $(B) AND (D)$ (2) $(A) AND (C)$ (3) $(B) AND (C)$ (4) $(A) AND (D)$ 222. $Adsorption theory is applicable for$ (1) $homogeneous catalysis$ (2) $heterogeneous catalysis$ (3) $autocatalysis$ (4) $induced catalysis.$ 223. $An example of solid sol is:$ (1) $Butter$ (2) $Hair cream$ (3) $Paint$ (4) $Gem stones$ 224. $An example of solid sol is:$ (1) $Paint$ (2) $Gem stones$ (3) $Butter$ (4) $Hair cream$ 225. $Identify the correct statements from the following: I. Sulphur sol is an example of a multimolecular colloid. II. Tyndall effect is observed when the diameter of the dispersed particles is not much smaller than the wavelength of the light used. III. The process of removing a dissolved substance from a colloidal solution by means of diffusion through a suitable membrane is called peptisation. IV. Eosin, gelatin are examples of negatively charged sols.$ (1) $I, II, III$ (2) $I, II, IV$ (3) $I, III, IV$ (4) $II, III, IV$ 226. $All colloidal dispersions have$ (1) $very high osmotic pressure$ (2) $low osmotic pressure$ (3) $no osmotic pressure$ (4) $high osmotic pressure.$ 227. $Reactions in zeolite catalyst depend on$ (1) $pores$ (2) $apertures$ (3) $size of cavity$ (4) $all of these.$