D2 O a. Boiling point is higher than H2 O b. D2 O reacts slowly than H2 O c. Viscosity is higher than H2 O at 25° d. Solubility of NaCl in it is more than H2 O Ans. d …
a. N2 b. He c. H2 d. CO2 e. O2 Ans. d Explanation : As the solubility increases value of Henry’s law constant decreases. Since CO2 is most soluble in water among the given set of gases. Therefore CO2 has …
KNO3 in water is shown below The amount of KNO3 that dissolves in 50g of water at 40° C is closest to a. 100g b. 150 g c. 200g d. 50g Ans. a Explanation : At 40° C solubility is …
a. Different gases have different KH values at the same tempertaure. b. The value of KH increases with increases of temperature and KH is function of the nature of the gas c. The partial pressure of the gas in vapour …
a. He b. O2 c. NH3 d. CO2 Ans. a Explanation : As the value of Henry’s law constant increases, the solubility of gas decreases. (13)
a. Temperature b. Nature of solute c. Pressure d. Nature of solvent Ans. c Explanation : Maximum amount of solid that can be dissolved in a specified amount of given solvent does not depend upon pressure. This is because solid …
a. Saturated b. Supersaturated c. Unsaturated d. Concentrated Ans. b Explanation : when solute is added to the solution three cases my arise: i. It dissolves into solution then solution is unsaturated ii. It does not dissolve in the solution …
a. Less than the rate of crystallisation b. Greater than the rate of crystallisation c. Equal to the rate of crystallisation d. Zero Ans. c Explanation : At equilibrium the rate of dissolution of solid in a volatile liquid solvent …
a. Normal b. High c. Low d. Cannot say Ans. a (23)
a. 0. 555 b. 5.55 c. 0.0555 d. 55.5 e. 5. 55 x 10-4 Ans. a (11)
a. H2 b. N2 c. CH4 d. CO2 e. Ar Ans. d Explanation : CO2 reacts with water and therefore is high soluble in water. So it greatly deviates from Henry’s law in water. (179)
a. The solute dissolve b. The excess solutes crystallizes out c. The solution becomes unsaturated d. The solution remains super saturated Ans. b Explanation : In supersaturated solution, more solute is present than the necessary amount to saturate the solution …
a. Interstitial defect b. Schottky defect c. Frenkel defect d. Frenkel and schottky defect Ans. b (18)
N2 gas in water at 298 K is 1.0 x 10 5 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 form air dissolved in 10 moles of water at 298 K and 5 atm …
K H is …….. a. Greater for gases with higher solubility b. Greater for gases with lower solubility c. Constant for all gases d. Not related to the solubility of gases Ans. b (9)
KH ………… a. Increases with increase in temperature b. Decrease with increase in temperature c. Remains constant d. First increase then decrease Ans. a Explanation : Value of Henry’s constant increases with creases in temperature representing the decreases in solubility (18)
a. Sugar crystals in cold water b. Sugar crystals in hot water c. Powered sugar in cold water d. Powered sugar in hot water Ans. d Explanation : Dissolution of sugar in water will be most rapid when powered sugar …
a. Mole fraction b. Parts per million c. Mass percentage d. Molality Ans.a (4)
O2 and C2 H2 gases are respectively at 25° C as 58 x 103 , 43 x 103 , 1.61 x 103 and 1.34 x 103 . The solubility of these gases decreases in the order a. CO > O2 …
a. Air b. Brass c. Amalgam d. Benzene in water Ans. d Explanation : Benzene can’t be dissolved in water and not form a true solution. (14)
a. The gas in contact with the liquid should behave as an ideal gas b. There should not be any chemical interaction between the gas and liquid c. The pressure applied should be high d. All of these Ans. b …
a. Dalton’s Law of Partial pressures b. Law of Mass Action c. Henry’s Law d. None of these Ans. c (15)
a. Nature of the gas b. Temperature c. Pressure of the gas d. All of the above Ans. d (8)
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
106 Schottky pairs per cm3 at room temperature. a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. FeO0.98 has non stoichiometric metal deficiency defect b. Density decreases in case of crystals with Schottky’s defect c. NaCl is insulator silicon is semiconductor silver conductor quartz is piezo electric crystal d. Frenkel defect is favoured in those ionic …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a = b ≠c, α = β = 90 °, ϒ = 120 ° a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. They are chemically reactive b. They have metallic conductive c. They are very hard d. They have high melting points Ans. a Explanation : Interstitial compound are almost inert so (a) is wrong statement (8)
a. Tridymite b. Amorphous silica c. Quartz d. Mica Ans. c Explanation : piezoelectric material are those that produce an electric current when they are placed under mechanical strees. (4)
a. Frenkel defect b. Metal deficiency defect c. Schottky defect d. Vacancy defect Ans. a Explanation : frenkel defect (10)
a. Creation of equal number of cation and anion vacancies b. Creation of unequal number of cation and anion vacancies c. Migration of cations to interstitial voids d. Migration of anions to interstitial voids Ans. a Explanation : In schottky …