MDCAT XI Chemistry States of Matter: Liquid Online Test-2

482

Created on June 25, 2025 By

📚 Test Details

Subject: Chemistry
Class: 1st year / XI
Chapter Name:States Of Matter: The Liquid
Test: 2
Book: Sindh Textbook
Total No. Of MCQs: 50 MCQs
Time Allowed: 50 Minutes

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1 / 50

1. Brownian motion is explained for

a) Liquid molecules for equal number of collisions

b) Gas molecules

c) Solid molecules

d) Collisions of unequal number in liquid

2 / 50

2. Van der Waals forces are:

a) Physical bond

b) Electromagnetic in nature

c) Intramolecular forces

d) A and C

3 / 50

3. If A is the gas, B is the solid, and C is the liquid, Generally, which of them is intermediate in reactions?

a) A

b) B

c) C

d) UNEVEN DATA

4 / 50

4. Liquid is used in the braking system because of

a) Diffusion

b) Contraction

c) High kinetic energy

d) None of them

5 / 50

5. Which of the following is strongest among those that exist in molecules?

a) Hydrogen bond

b) Dipole-dipole force

c) Covalent bond

d) Metallic bond

6 / 50

6. Hydrogen bond exists in all except

a) Ethane amine

b) H₂O

c) HF

d) NH₃

e) All have hydrogen bond

7 / 50

7. Strong hydrogen bond exists in

a) H₂O

b) NH₃

c) HF

d) OH⁻

8 / 50

8. Density of water is 1 g/cm³ at

a) 20 K

b) 273°C

c) 293°C

d) 293 K

9 / 50

9. If the glass of water is filled in a jug present in the room, then what about hydrogen bonding?

a) Strong because room has 25°C temperature

b) Strong because of more energetic motion

c) Strong because of low energetic motion

d) Temporary because of high energy

10 / 50

10. Choose the volatile liquid from the following:

a) Hg

b) I₂

c) F₂

d) Br₂

11 / 50

11. Vapour pressure of diethyl ether is _____ at 20°C

a) 0.4 atm

b) 0.3 atm

c) 0.2 atm

d) 170 atm

12 / 50

12. Viscosity of ethyl alcohol at 20°C is ___ in centipoise

a) 0.322

b) 0.701

c) 1.005

d) 1.19

13 / 50

13. Deepak is good at performing sublimation. If he finds a box having solid CO₂ in it, he sublimes it into CO₂ gas and the product mass is 88 g. What will be the heat of sublimation?

a) +25.2 kJ

b) −25.2 kJ

c) 40.7 kJ

d) 50.4 kJ

14 / 50

14. Liquid crystal was discovered by

a) Williams Crooks

b) Fredrich Reintzer

c) Roman Reign

d) David Albumin

15 / 50

15. Usually, liquid crystals are

a) Organic

b) Inorganic

c) Inorganic and organic

d) Medium organic

16 / 50

16. Molecular arrangement of liquid crystal resembles

a) Liquid

b) Solid

c) Liquid and solid

d) Gas

17 / 50

17. At sea level, if I have some heat of 40.7 kJ/mol and use it in vaporization of water, when the state is changing, the extra heat I give is used in

a) To increase temperature

b) To break bond

c) No extra heat is given

d) Incomplete data

18 / 50

18. Cholesteryl benzoate melts to clear liquid at

a) 176.5°C

b) 145.5°C

c) 178.5°C

d) 145.8°C

19 / 50

19. Surface tension of acetone in dyne/cm is

a) 2203

b) 27.1

c) 23.7

d) 28.88

20 / 50

20. What is the boiling point at pressure 1 atm known as?

a) Standard boiling point

b) Normal boiling point

c) Van der Waals boiling point

d) Saturated boiling point

21 / 50

21. Viscosity of liquid _________ with rise in temperature.

a) Increases

b) Decreases

c) Remains constant

d) Is independent

22 / 50

22. What is the S.I. unit of surface tension?

a) Dyne/meter

b) Newton-meter

c) Newton/meter

d) Dyne-meter

23 / 50

23. If the water is filled in a container and liquid molecules are at right angles to the container body, then which of the following statements is correct?

a) Adhesive > Cohesive

b) Cohesive > Adhesive

c) Adhesive = Cohesive

d) None of these

24 / 50

24. Water droplets are spherical due to

a) Viscosity

b) Poise

c) Surface tension

d) Reflection

25 / 50

25. If the viscosity is high, then the liquid will flow

a) Fast speed

b) Slow speed

c) Moderate speed

d) Viscosity doesn’t affect speed

26 / 50

26. The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is ___?

a) Molar heat of sublimation

b) Molar heat of fusion

c) Molar heat of vaporization

d) Latent heat of that liquid

27 / 50

27. Molar heat of vaporization of water is ____

a) 40.7 kJ/mol

b) 40.7 J/mol

c) 40.7 cal/mol

d) 40.7 kcal/mol

28 / 50

28. When water freezes at 0°C, its density decreases due to ____

a) Change of bond angles

b) Cubic structure of ice

c) Empty space present in the structure of ice

d) Change of bond length

29 / 50

29. The conversion of vapors back into their liquid state is called ______

a) Crystallization

b) Evaporation

c) Vaporization

d) Condensation

30 / 50

30. All of them are related with evaporation except

a) Surface phenomenon

b) Continuous

c) Exothermic

d) Cause cooling

e) All are related

31 / 50

31. Hydrogen bond is absent in

a) Water

b) Ethyl alcohol

c) Phenol

d) Diethyl ether

32 / 50

32. Ice floats on water because it is

a) More dense

b) Equal in density to water

c) Less dense than water

d) Less and equally dense to water

33 / 50

33. If the force is weak, volatility is large. Which of the following is most volatile?

a) Diethyl ether

b) Ethyl alcohol

c) Water

d) Ethylene glycol

34 / 50

34. Covalent bond is ------ of hydrogen bond

a) 1%

b) 5%

c) 8%

d) None of these

35 / 50

35. Weakest intermolecular force is

a) Dipole-dipole

b) London dispersion force

c) Ion-dipole force

d) Dipole-induced dipole

36 / 50

36. Correct order about compressibility

a) Liquid < Gas < Solid

b) Solid < Liquid < Gas

c) Gas < Liquid < Solid

d) Solid < Gas < Liquid

37 / 50

37. The properties which decrease with increase in temperature, except

a) Surface tension

b) Viscosity

c) Density

d) Vapour pressure

38 / 50

38. Unit of viscosity

a) Poise

b) Dyne/cm

c) Joule/m²

d) Joule

39 / 50

39. Given below are some transport properties. Which of the following is not?

a) Conductance

b) Surface tension

c) Viscosity

d) Diffusion

40 / 50

40. Which of the following liquids has maximum diffusion?

a) O₂

b) CO₂

c) NH₃

d) Br₂

41 / 50

41. Which of the following is used as an antifreezer?

a) Ethylene glycol

b) Propanoic acid

c) Glutamic acid

d) Glycolic acid

42 / 50

42. When the liquid is compressed at constant temperature, then

a) The speed of the molecules decreases

b) The speed of the molecules increases

c) The speed of the molecules remains unchanged

d) The collisions between the molecules decrease

e) None of these

43 / 50

43. When liquid is converted to gas, the process is called

a) Precipitation

b) Vaporization

c) Decantation

d) Condensation

44 / 50

44. By decreasing the external pressure on a liquid

a) Increases the boiling point of the liquid

b) Lowers the boiling point of the liquid

c) Does not affect the boiling point of the liquid

d) Increases the time required for it to boil

45 / 50

45. Rate of evaporation is increased with

a) An increase of surface area

b) An increase in humidity

c) A decrease in wind speed

d) A decrease of temperature

46 / 50

46. Water boils at low temperature at high altitudes because

a) The air pressure is less

b) Outside temperature is less

c) Latent heat is less

d) None of the above

47 / 50

47. Hydrogen bond is absent in

a) Water

b) Ethyl alcohol

c) Phenol

d) Diethyl ether

48 / 50

48. The reason for exceptionally high boiling point of water is

a) Its high specific heat

b) Its high dielectric constant

c) Low ionization of water molecules

d) Hydrogen bonding in the molecules of water

49 / 50

49. By increasing size and number of organic compounds, melting and boiling point increase because

a) More strength of H-bonding

b) More strength of London forces

c) Less polarizability

d) All of the above

50 / 50

50. The force of attraction between the molecules of F₂ is:

a) London dispersion force

b) Covalent bond

c) Instantaneous dipole-induced dipole

d) Hydrogen bonding

e) A and C

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MDCAT XI Chemistry States of Matter: Liquid Online Test-2

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