CBSE Class 12 Surface Chemistry — practice questions
35 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Surface Chemistry in the app →The solubility of a gas in a liquid generally:A $0.5$ molal aqueous solution of a non-electrolyte ($K_b = 0.52$ K kg/mol for water) boils at:A solution of $0.1$ M sucrose at $300$ K has osmotic pressure (using $R = 0.0821$ L atm/(mol K)):The van't Hoff factor $i$ for $0.1$ m NaCl (assuming complete dissociation) is:The MOLARITY of a solution containing 58.5 g NaCl dissolved in 1 L of solution is:The KEY DIFFERENCE between molarity (M) and molality (m) is that:HENRY'S LAW states that at constant temperature:A MINIMUM-BOILING azeotrope arises from:Which of these is NOT a colligative property?Salt is sprinkled on icy roads in cold countries to:The OSMOTIC PRESSURE π of a dilute solution is given by:The van't Hoff factor (i) for sodium chloride (NaCl) in water is approximately:Raoult's law for an ideal solution of two volatile components states:Molecules gathering at a surface rather than in the bulk is:The substance that gathers on the surface is the:The material on whose surface adsorption happens is the:Adsorption is essentially a phenomenon of the:Finely divided solids make good adsorbents because they have large:Charcoal shaken with a dye solution leaves the filtrate:Air is dried by silica gel because water molecules are:Removing an adsorbed substance from a surface is called:In absorption, against adsorption, the substance is spread:A chalk stick dipped in ink keeps ink colour on its surface by:The single term covering both adsorption and absorption is:Water vapour is absorbed by anhydrous calcium chloride but:Adsorption happens because surface particles carry forces that are:Adsorption releases heat, so the process is always:A gas losing freedom of movement on adsorption shows a fall in:Adsorption held by weak van der Waals forces is called:Adsorption held by chemical bonds is called:Chemisorption needs a high energy of activation, so it is also called:Physisorption shows no preference for a particular gas, so it lacks:Physical adsorption of a gas by a solid is generally:Chemisorption involves compound formation, so it is usually:Gases that are easily liquefied are adsorbed: