CBSE Class 12 Solid State — practice questions
49 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Solid State in the app →Henry's law for the solubility of a gas in a liquid is best stated as:Why are deep-sea divers given a breathing mixture of helium and oxygen instead of ordinary air?The mole fraction of urea ($M = 60\,\text{g/mol}$) in an aqueous solution containing $6\,\text{g}$ of urea in For an ideal solution containing two volatile liquids A and B, Raoult's law gives the total vapour pressure asFor a dilute solution of a non-volatile solute B in a solvent A, the relative lowering of vapour pressure equaThe elevation in boiling point of a solution is given by $\Delta T_b = K_b m$. The molal elevation constant $KThe freezing point of water is depressed when a non-volatile solute is added because:Osmotic pressure of a dilute solution is expressed by van't Hoff's equation as:Two solutions are said to be **isotonic** if they:If $\mathrm{NaCl}$ undergoes complete dissociation in water, the van't Hoff factor $i$ is:Benzoic acid associates in benzene to form dimers. The van't Hoff factor $i$ for benzoic acid in benzene (assuDesalination of sea water is best carried out by:A solution of glucose in water has a freezing point depression of $0.186\,\text{K}$. Given $K_f$ for water $= A solution showing positive deviation from Raoult's law has: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:Solids are classed as crystalline or amorphous by the nature of their:In a crystal, the arrangement of particles is ordered and:A crystal is said to have order that is:Which of these is a typical crystalline solid?Glass, rubber and plastics are examples of solids that are:The Greek word amorphos means:An amorphous solid has order that is:The structure of an amorphous solid resembles that of a:Amorphous solids have properties that are the same in:A solid with the same properties in every direction is called:Crystalline solids show properties that differ with direction, so they are:Amorphous solids are described as pseudo solids or super cooled:A unit cell with particles only at the corners is called:A unit cell with particles beyond the corners is called:Centred unit cells come in how many types?A cell with one extra particle at its centre is called:A cell with an extra particle at the centre of every face is:A cell with extra particles on two opposite faces is:Particles occupying an interstitial site give a defect that is:An interstitial defect changes the density of a substance by:Vacancy and interstitial defects are shown by solids that are:Ionic solids must always maintain: