Brand new Course Package released! Get 99% off your first purchase with code “99”. Find out more!
Back
0

Shopping cart

Close

No products in the cart.

Chemistry

HomeChemistryPage 7

1. The amount of anhydrous

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

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

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

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

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

22. The solubility curve of

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

11.

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

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

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….

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…

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….

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

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

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

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

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

  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

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,

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

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

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

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,

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

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

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

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

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

6. Assertion : Anion vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour. Reason : Electrons trapped in anion vacancies are referred to as F- centres.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

5. Assertion : The presence of a large number of Schottky defects in NaCl lowers its density. Reason : In NaCl there are approximately

106 Schottky pairs per cm3 at room temperature. a. If both assertion and reason are true and the reason is...

4. Assertion : Quasi- Crystals form when certain molten alloys cool very slowly. Reason : Quasi-crystals have shorts range as well as

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

35. Which is the incorrect statement

a. FeO0.98   has non stoichiometric metal deficiency defect b. Density decreases in case of crystals with Schottky’s defect c. NaCl...

11. Assertion : The Crystal structure gets stabilized even though the sum of elecron gain enthalpy and ionization enthalpy is positive . Reason : Energy is absorbed during the formation of crystal lattice.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

10. Assertion : Graphite is an example of tetragonal crystal system. Reason : For a tetragonal system.

a = b ≠c, α   =  β = 90 °, ϒ = 120 ° a. If both assertion and...

9. Assertion : No compound has both schottky and Frenkel defects. Reason : Both defects change the density of the solid.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

8. Assertion : Lead zirconate is a piezoelectric crystal. Reason : Lead zirconate crystals have no dipole moment.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

7. Assertion : On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic. Reason : The electrons change their spin on heating.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

3. Assertion : Crystalline solids have short range order. Reason : Amorphous solids have long range order

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

2. Assertion : In crystal lattice the size of the cation is larger in a tetrahedral hole than in an octahdral hole. Reason : The cations occupy more space than anions in crystal packing.

  a. If both assertion and reason are true and the reason is the correct explanation of the assertion b....

1. Assertion : Diamond is a precious stone. Reason : Carbon atoms are tetrahedrally arranged in diamond

a. If both assertion and reason are true and the reason is the correct explanation of the assertion b. If...

37. The statement that is INCORRECT about the interstitial compounds is

a. They are chemically reactive b. They have metallic conductive c. They are very hard d. They have high melting...
Haryana Police Recruitment Group C & D Vacancies & Coaching | Haryana CET Based Preparation
NEET 2026 FAQ – Syllabus, Exam Date, Preparation Tips & Course (Flame Institute)
SSC GD 2026, Notification, Apply Online, Vacancy, Eligibility, Exam Date, Syllabus, Online Form, Age Limit, PET/PST, Selection Process

Sign up to receive latest updates

Get in touch
Need some help?
Popular subjects
Need some help?
  • © 2025 Flame Institute.All rights reserved.
error: Content is protected !!