Chemistry

1. The amount of anhydrous

Jun 6, 2022
Chemistry

Na2 CO3 present in 250 mL of 0.25 M solution is a. 6.225g b. 66.25 g c. 6.0 g d....

25. For the solution of the gases w,x,y and z in water at 298K, the Henrys law constants are 0.5, 2, 35 and 40K bar respectively . The correct plot for the given data is

Jun 6, 2022
Chemistry

Answer. C (45)

23. The variation of solubility of four different gases (G1, G2. etc) in a given solvent with pressure at a constant temperature is shown in the plot

Jun 6, 2022
Chemistry

The gas with the highest value of Hnery’s law constant is a. G4 b. G2 c. G3 d. G1 Ans....

19. Which of the following is not correct for

Jun 3, 2022
Chemistry

D2 O a. Boiling point is higher than H2 O b. D2 O reacts slowly than H2 O c. Viscosity...

20. Which one of the following gases has the lowest value of Henry’s law constant

Jun 3, 2022
Chemistry

a. N2 b. He c. H2 d. CO2 e. O2 Ans. d Explanation : As the solubility increases value of...

22. The solubility curve of

Jun 3, 2022
Chemistry

KNO3 in water is shown below The amount of KNO3 that dissolves in 50g of water at 40° C is...

11.

Jun 3, 2022
Chemistry

KH value fro Ar(g), CO2 (g), HCHO (g) and CH4 (g) are 40.39 , 1.67, 1.83 x 10-5 and 0.413 respectively...

24. Which one of the following statements regarding Henry’s law is not correct

Jun 3, 2022
Chemistry

a. Different gases have different KH values at the same tempertaure. b. The value of KH increases with increases of...

21. Least soluble gas in water will is

Jun 3, 2022
Chemistry

a. He b. O2 c. NH3 d. CO2 Ans. a Explanation : As the value of Henry’s law constant increases,...

18. Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon….

Jun 3, 2022
Chemistry

a. Temperature b. Nature of solute c. Pressure d. Nature of solvent Ans. c Explanation : Maximum amount of solid...

17. A beaker contains s solution of substance ‘A’ precipitation of substance ‘A’ takes place when small amount of ‘A’ is added to the solution . The solution is…

Jun 3, 2022
Chemistry

a. Saturated b. Supersaturated c. Unsaturated d. Concentrated Ans. b Explanation : when solute is added to the solution three...

16. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is….

Jun 3, 2022
Chemistry

a. Less than the rate of crystallisation b. Greater than the rate of crystallisation c. Equal to the rate of...

15. Normal human blood sugar range is 65 – 105 mg/dL. Considering density of human blood is 1.06kg/L, if a patient’s sugar level reads 720 ppm, his/her blood sugar at that time is

Jun 3, 2022
Chemistry

a. Normal b. High c. Low d. Cannot say Ans. a (24)

14. When a gas is bubbled through water at 298 K, a very dilute solution of the gas is obtained. Henry’s law constant for the gas at 298 K is 100 kbar. If the gas exerts a partial pressure of 1 bar the number of millimoles of the gas dissolved in one litre of water is

Jun 3, 2022
Chemistry

a. 0. 555 b. 5.55 c. 0.0555 d. 55.5 e. 5. 55 x 10-4 Ans. a (12)

13. Which among the following gas will greatly deviate from Henry’s law in water

Jun 3, 2022
Chemistry

a. H2 b. N2 c. CH4 d. CO2 e. Ar Ans. d Explanation : CO2 reacts with water and therefore...

6. When a crystal of the solute is introduced into a super saturated solution of the solute

Jun 3, 2022
Chemistry

a. The solute dissolve b. The excess solutes crystallizes out c. The solution becomes unsaturated d. The solution remains super...

9. What type of crystal defect is indicated in the diagram below

Jun 3, 2022
Chemistry

a. Interstitial defect b. Schottky defect c. Frenkel defect d. Frenkel and schottky defect Ans. b (19)

12. The Henry’s law constant for the solubility of

Jun 3, 2022
Chemistry

N2 gas in water at 298 K is 1.0 x 10 5 atm. The mole fraction of N2 in air is 0.8....

10. The value of Henry’s constant,

Jun 3, 2022
Chemistry

K H is …….. a. Greater for gases with higher solubility b. Greater for gases with lower solubility c. Constant for...

9. Value of Henry’s constant

Jun 3, 2022
Chemistry

KH ………… a. Increases with increase in temperature b. Decrease with increase in temperature c. Remains constant d. First increase then...

8. On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid

Jun 3, 2022
Chemistry

a. Sugar crystals in cold water b. Sugar crystals in hot water c. Powered sugar in cold water d. Powered...

7. Which of the following units is useful in relating concentration of solution with its vapour pressure

Jun 3, 2022
Chemistry

a. Mole fraction b. Parts per million c. Mass percentage d. Molality Ans.a (7)

5. Henry’s law constants for aqueous solution of CO,

Jun 3, 2022
Chemistry

O2 and C2 H2 gases are respectively at 25° C as 58 x 103 , 43 x 103 , 1.61...

4. Out of following which one is not an example of a solution

Jun 3, 2022
Chemistry

a. Air b. Brass c. Amalgam d. Benzene in water Ans. d Explanation : Benzene can’t be dissolved in water...

3. Which is correct about Henry’s law

Jun 3, 2022
Chemistry

a. The gas in contact with the liquid should behave as an ideal gas b. There should not be any...

2. The statement “The mass of a gas dissolved in a given mass of a solvent at any temperature is proportional to the pressure of the gas above the solvent” is

Jun 3, 2022
Chemistry

a. Dalton’s Law of Partial pressures b. Law of Mass Action c. Henry’s Law d. None of these Ans. c...

1. The Solubility of a gas in water depends on

Jun 3, 2022
Chemistry

a. Nature of the gas b. Temperature c. Pressure of the gas d. All of the above Ans. d (10)