XI Chemistry State Of Matter: Liquids Online Test Mdcat-2024

Instructions for Chapter State Of Matter: Liquids Online Test Mdcat-2024:

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Test Details:

Subject: Chemistry
Class: 1st year or 11
Chapter name: State Of Matter: Liquids
Test: MDCAT 2024
Book: Sindh Textbook
Total No. Of MCQS: 50
Time Allowed: 50 Minutes
Price : Free

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Created on June 22, 2024 By

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XI Chemistry State Of Matter: Liquids Online Test Mdcat-2024

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NameEmailPhone Number

1 / 50

1. In terms of KMT which of the following is true for liquids :

a) Liquid molecules are close together having small spaces among them

b) Movement of liquid molecules is restricted

c) Weak attractive forces are present among liquid molecules

d) All of these

2 / 50

2. Select the correct statement

a) Liquids are less compressible as compared to solids

b) Expansion in liquids is less than gases

c) Attractive forces in liquids are gravitational in nature

d) All of these

3 / 50

3. The electrostatic force of attraction between the positive end of one polar molecule and the negative end of other polar molecule is called as:

a) Dipole induced Dipole

b) London Dispersion force

c) Dipole Dipole interaction

d) Instantaneous Dipole

4 / 50

4. Strength of Dipole Dipole interactions depends on:

a) Size of molecules

b) I.E

c) Difference of electronegativity

d) Non-Polarity

5 / 50

5. Which type of intermolecular force exist in I-Cl

a) Dipole Dipole interaction

b) Hydrogen Bonding

c) London Dispersion

d) None

6 / 50

6. The strength of hydrogen bond is about __ of the strength of covalent bond

a) 0.01%

b) 5-10%

c) 0.1 to 1%

d) 1/5

7 / 50

7. Cleaning action of soap and detergent is based on:

a) Metalic Bonding

b) Covalent Bonding

c) Hydrogen Bonding

d) None

8 / 50

8. Select the incorrect:

a) Water exists in liquid state at ordinary temperature rather than gas due to presence of hydrogen bonding

b) The cohesive action of paints is developed due to hydrogen bonding

c) In proteins and DNA Hydrogen bond holds their chain in particular sequence

d) None, as all stataments are correct

9 / 50

9. Maximum hydrogen bonds a single water molecule can form:

a) 1

b) 2

c) 3

d) 4

10 / 50

10. Liquids are used in Hydraulic Brake system due to

a) Surface Tension

b) Low Compressibility

c) High Density

d) Slow Diffusion

11 / 50

11. All of the following properties possess direct relation with force of attractions except

a) Vapour Pressure

b) Surface Tension

c) Viscosity

d) Boiling Point

12 / 50

12. With the increase in pressure which of the following increases

a) Vapour pressure

b) Viscosity

c) Surface Tension

d) All

13 / 50

13. Which type of intermolecular force is found in benzene and toluene?

a) Hydrogen Bond

b) Dipole Dipole interaction

c) London Dispersion

d) None

14 / 50

14. Which of the following is correct order based on the strength of hydrogen bonding

a) H₂O>HF>NH₃

b) H₂O<NH₃<HF

c) HF>NH₃>H₂O

d) HF>H₂O>NH₃

15 / 50

15. B.P of water is more than HF Because of:

a) High E.N of Oxygen

b) 3-D bonding in H₂O

c) 3-D bonding in HF

d) A and B

16 / 50

16. Select the correct order regarding B.P

a) HCl>HBr>HI>HF

b) HCl<HBr<HI<HF

c) HF>HI>HBr>HCl

d) HI>HF>HCl>HBr

17 / 50

17. Solubility of chloroform in Acetone is because of

a) Hydrogen Bonding

b) Covalent Bonding

c) Molecular Binding

d) None

18 / 50

18. Force of attraction between instantaneous dipole and induced dipole

a) Debye Force

b) London Dispersion

c) Hydrogen Bonding

d) Dipole Dipole

19 / 50

19. Water when cooled from 4°C to 0°C it __ and volume of ice __ upto___

a) Contracts,Decreases,10%

b) Expands,Decrease,10%

c) Contracts,Increase,10%

d) Expands, Increase,10%

20 / 50

20. Density of water at 0°C is __ than density of water at 4°C

a) More

b) Less

c) Equal

d) None

21 / 50

21. Factors which affect the rate of evaporation :

a) Surface Area

b) Intermolecular forces

c) Temperature

d) All of these

22 / 50

22. Select the incorrect regarding evaporation

a) It is a surface phenomenon

b) Evaporation rate is higher in volatile liquids

c) Evaporation is a exothermic process

d) Evaporation is the cooling process

23 / 50

23. Forming of water droplets at the outer surface of a cold bottle when it is taken out from refrigerator is due to

a) Evaporation

b) Condensation

c) Surface Tension

d) Vapour pressure

24 / 50

24. The temperature at which vapor pressure of liquid is equal to atmospheric pressure

a) Boiling point

b) Vapor pressure

c) Condensation

d) Evaporation

25 / 50

25. Select the incorrect regarding vapor pressure

a) It is a pressure exerted by vapours when they are in equilibrium with atmospheric pressure

b) It is a function of temperature

c) It is independent of surface area

d) Volatile liquids have high vapour pressure

26 / 50

26. Liquids with high vapour pressure have:

a) Low evaporation rate

b) Low Boiling point

c) Low volatility

d) High Boiling point

27 / 50

27. Select the incorrect statement regarding boiling point

a) Boiling point is directly proportional to outside pressure

b) B.P do not depend upon amount of liquids

c) Boiling point depends upon force of attraction

d) None of these

28 / 50

28. Viscosity of liquids is can be affected by following factors

a) Intermolecular forces

b) Temperature

c) Molecular Size

d) All

29 / 50

29. S.I unit of viscosity

a) Poise

b) Centipoise

c) N.s/m²

d) N.s.m²

30 / 50

30. Why the temperature of coastal areas usually remains moderate throughout day and night.

a) High specific heat of water

b) High Density of water

c) Low specific heat of water

d) High viscosity of water

31 / 50

31. Due to presence of hydrogen bonds water molecules are strongly attracted and occupy less volume. This best describes the:

a) High Boiling point of water

b) High specific heat of water

c) High Density of water

d) High Viscosity

32 / 50

32. Marine life survives under water due to:

a) Low specific heat of water

b) Low Density of water

c) Low viscosity

d) None of these

33 / 50

33. The attractive forces that exist among non-polar molecules which become polar temporarily

a) Dipole Dipole interaction

b) London Dispersion forces

c) Hydrogen Bonding

d) All of these

34 / 50

34. Gasoline and Benzene are non-polar molecules but exist in liquid state at room temperature due to the presence of __

a) Hydrogen Bonds

b) London Dispersion forces

c) Dipole Dipole

d) None of these

35 / 50

35. Which of the following properties is most responsible for the formation of droplets in a liquid?

a) Viscosity

b) Surface tension

c) Density

d) Vapor pressure

36 / 50

36. Which property of a liquid decreases with an increase in temperature?

a) Density

b) Surface tension

c) Viscosity

d) All of the above

37 / 50

37. The ability of a liquid to flow and take the shape of its container is primarily due to:

a) Low compressibility

b) Strong intermolecular forces

c) High kinetic energy of molecules

d) Moderate intermolecular forces

38 / 50

38. Which of the following statements is true about the vapor pressure of a liquid?

a) It decreases as the temperature increases.

b) It is the pressure exerted by a vapor in equilibrium with its liquid at a given temperature.

c) It is independent of temperature.

d) It is higher for liquids with stronger intermolecular forces.

39 / 50

39. Which of the following statements best describes the anomalous expansion of water?

a) Water contracts upon freezing from 0°C to -10°C.

b) Water has its highest density at 4°C.

c) Water continuously expands as the temperature decreases from 10°C to 0°C.

d) Water is most dense at 0°C.

40 / 50

40. The anomalous behavior of water is crucial for aquatic life in cold climates. Which of the following is a direct consequence of this behavior?

a) Ice sinks to the bottom of lakes and oceans.

b) Water becomes less dense as it cools from 4°C to 0°C, causing ice to form at the surface.

c) Water remains at a constant density regardless of temperature changes.

d) Water is most dense at the freezing point.

41 / 50

41. The phenomenon of a liquid rising in a narrow tube against the force of gravity is known as:

a) Adhesion

b) Cohesion

c) Capillary action

d) Surface tension

42 / 50

42. What is the term used for the amount of energy required to convert 1 gram of a solid into a liquid at its melting point?

a) Heat of vaporization

b) Heat of fusion

c) Specific heat capacity

d) Heat of sublimation

43 / 50

43. Which of the following processes involves the release of energy?

a) Melting

b) Vaporization

c) Condensation

d) Sublimation

44 / 50

44. During the phase change from liquid to gas at the boiling point, what happens to the temperature of the substance?

a) It increases

b) It decreases

c) It remains constant

d) It first increases and then decreases

45 / 50

45. The energy required to change a substance from the liquid phase to the gas phase at constant temperature and pressure is known as:

a) Heat of fusion

b) Heat of vaporization

c) Heat capacity

d) Heat of condensation

46 / 50

46. What is a defining characteristic of liquid crystals that distinguishes them from traditional liquids and solids?

a) They flow like liquids but have ordered structures like solids.

b) They are completely amorphous.

c) They do not exhibit any order in their molecular arrangement.

d) They are only found in gaseous states.

47 / 50

47. Which of the following is a common application of liquid crystals?

a) Lubricants

b) Liquid crystal displays (LCDs)

c) Adhesives

d) Fuel additives

48 / 50

48. Which of the following best explains the phenomenon of capillary action in liquids?

a) The cohesive forces between liquid molecules are stronger than the adhesive forces between the liquid and the container.

b) The adhesive forces between the liquid molecules and the container are stronger than the cohesive forces between the liquid molecules

c) The density of the liquid is the main factor determining capillary action

d) The viscosity of the liquid is the primary reason for capillary action.

49 / 50

49. Unit of surface tension is:

a) Dyne/cm²

b) erg/cm

c) dyne/cm

d) Both A and B

50 / 50

50. Which of the following liquids show maximum surface tension

a) Water

b) Mercury

c) Ethyl Alcohol

d) Gasoline

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Instructions for Chapter State Of Matter: Liquids Online Test Mdcat-2024:

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