Home/ECAT/ECAT Chemistry Liquids Test Online

ECAT Chemistry Liquids Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry Liquids MCQS Online Test

ECAT Chemistry Liquids Chapter Online Test

Total Questions:	45
Time Allowed:	20 Minutes
Total Marks:	45
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

ECAT Chemistry Liquids Test

Please wait...

Page 1 of 2

Chemistry

1. Which one of the following statements about negative ions is incorrect?

They are also known as anions

They are formed only in metals

They are larger than the atom from which they were formed

They are formed when atoms gain electrons

2. Two droplets merge with each other and forms a large droplet. In this process

Neither liberated nor absorbed

Some mass is converted into energy

Energy is liberated

Energy is absorbed

3. The forces present between the ions and water molecules are called

Dipole – induced dipole forces

Ion – dipole forces

London dispersion forces

Dipole – dipole forces

4. Water has maximum density at

4⁰C

2⁰C

100⁰C

0⁰C

5. London dispersion forces are also called

Dipole-induced dipole forces

Instantaneous dipole induced dipole forces

Dipole-dipole forces

Ion-dipole forces

6. It is easy to wash clothes in hot water because its

Consumes less soap

None of these

Surface tension is more

Surface tension in less

7. NH₃ shows a maximum boiling point among the hydrides of V – A group elements due to

Pyramidal structure of NH₃

Very small size of nitrogen

Enhanced electronegative character of nitrogen

Ione pair of electrons present on nitrogen

8. Which of the following equations represents the 2nd ionization energy of Na?

Na(g) → N²⁺ (g) + +¯

Na(g) → N²⁺ (g) + e¯

Na(s) → N²⁺ (g) + 2e¯

Na(s) → N²⁺ (g) + e¯

9. The attracted forces which are created due to repulsion of electronic cloud of the molecules are

Dipole – induced dipole forces

Dipole – dipole forces

Ion-dipole forces

Instantaneous dipole – induced dipole forces

10. On mixing the salt in water, the surface tension of water will

Remains unchanged

Increase

None of these

Decrease

11. What do we see on the surface of the glass containing ice-chilled water?

Water droplets

Water vapour

Ice

Dust

12. The strength of dipole-dipole forces depends upon

Both A & B

Electro negativity difference

Electro positivity difference

Distance between atoms

13. Molecular iodine would be most soluble in:

Carbon tetrachloride

Vinegar (acetic acid and water)

Alcohol

Water

14. Vapour pressure of H₂O at 100C° is

760 mm of Hg

1489 mm Hg

55 mm of Hg

355 mm Hg

15. Stronger the intermolecular forces

Lower the Vapour pressure

None

Greater the Vapour pressure

May be smaller or greater

16. London dispersion forces are the only force present among the

Atoms if helium in gaseous state at high temperature

Molecules of hydrogen chloride gas

Molecules of solid iodine

Molecules of water in liquids state

17. Amorphous substances possess

Sharp melting points

No definite heat of fusion

Sharp B.P.

Definite heat of fusion

18. Van der Waal’s forces exist in

Covalent

Polar compounds

All types of atoms and molecules

Non-polar

19. Water has high boiling point which is due to

Weak dissociation

High electric constant

H – bonding between its molecules

High specific heat

20. The maximum hydrogen bonding is in

Water

Diethyl ether

Ethanol

Benzene

21. The boiling point of CH₄ is much lower than that of HF. This is because:

Of dipole-dipole interactions in CH₄.

CH₄ is polar

Of hydrogen bonding in HF

HF is more polarizable

22. How are the boiling and freezing point of a sample of water affected when salt is dissolved in the water?

The boiling decreases and the freezing point decreases.

The boiling point decreases and the freezing point increases.

The boiling point increases and the freezing point decreases.

The boiling point increases and the freezing point increases.

23. g point of water is about 200°C higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?

The intermolecular attractive forces are much greater in water than in hydrogen sulfide and hydrogen selenide.

The water molecule is lighter than the other two molecules.

Water has the lowest molecular weight

Water is less polar than hydrogen sulfide and hydrogen selenide.

24. The boiling point increases down the zero group element due to

Hydrogen bonding

Ion dipole forces

Dipole-dipole forces

London forces

25. A solute is most likely to be highly soluble in a solvent of the solute is ________ and the solvent is ________.

Of dipole-dipole interactions in CH₄.

Of hydrogen bonding in HF.

CH₄ is polar.

HF is more polarizable

Page 2 of 2

26. An 8.29 g sample of calcium carbonate [CaCO₃(s)] absorbs 50.3 J of heat, upon which the temperature of the sample increases from 21.1 °C to 28.5 °C. What is the specific heat of calcium carbonate?

.82

1.1

.63

2.2

27. How many joules of heat are absorbed when 70.0 grams of water is completely vaporized at its boiling point?

7,000

23,352

15,813

158,130

28. The quantity of heat required to convert one mole of liquid into its vapors at its boiling point is called heat of

Sublimation

Crystallization

Evaporation

Vaporization

29. Water has maximum density at

2C°

100C°

4C°

0C°

30. Which one of the following is not a form of chemical bonding?

Metallic bonding

Covalent bonding

Hydrogen bonding

Ionic bonding

31. Which one of the following exhibits intermolecular hydrogen bonding?

HCI

HBr

32. Water has a specific heat of 4.184 J/g deg while glass (Pyrex) has a specific heat of 0.780 J/g deg. If 10.0 J of heat is added to 1.00 g of each of these, which will experience the larger increase of temperature?

Glass

Water

They both will experience the same change in temperature since only the amount of a substance relates to the increase in temperature

None of these

33. In order to mention B.P of H₂O at 110°C, the external pressure should be

Between 200 torr and 760 torr

Any value of pressure

765 torr

Between 760 torr and 1200 torr

34. What amount of heat (in kJ) is required to melt 35.0 g of ice at 0°C?

79.1 kJ

3.09 kJ

11.7 kJ

20.9 kJ

35. Evaporation of water in shade is

None of these

Fast

Faster

Slow

36. Hydrogen bonding is involved in

Detergent

All

Biological molecule

Solubility

37. At room temperature, F₂, and Cl₂ are gases, Br₂ is a liquid, and I₂ is a solid. This is because:

Dispersion interactions increase with molecular size

Dipole-induced dipole interactions increase with molecular size

Dipole-dipole interactions increase with molecular size

Polarity increases with molecular size

38. When water freezes at 0⁰C its density decreases due to

Change of bond angles

Cubic structure of ice

Empty space present in the structure of ice

Change of bond length

39. Molar heat of vaporization of water is

40.7 KJ/mole

40.7 Kcal/mole

40.7 cal/mole

40.7 J/mole

40. When water freezes at 0c its density decreases due to

Cubic structure of ice

Empty space presenting structure of ice

Change of bond length

Change of bond angles

41. Rising of an wetting liquid in a capillary tube is due to

Viscosity

Adhesive forces

Surface tension

Cohesive forces

42. When the external pressure is 101.3 kPa torr, water will boil at what temperature?

12.8°C

14.5°C

100°C

18°C

43. Evaporation causes

High temperature

Cooling

High pressure

Vapour pressure

44. Ice is _________ crystal

Metallic

Molecular

Ionic

Covalent

45. Which of the following statements in incorrect?

The boiling point of noble gases increases down the group

The layers in graphite are held together by van der Waals forces

H₂O has higher than expected b.p. because of intermolecular Van der Waals forces.

The greater the number of electrons in a molecule, the greater the van der Waals forces

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

UET Peshawar Entry Test 2025 Registration Online ETEA Test D...
ECAT Statistics Test Set 17
ECAT Statistics Test Set 16
ECAT Statistics Test Set 15
ECAT Statistics Test Set 14
ECAT Statistics Test Set 13
ECAT Statistics Test Set 12
ECAT Statistics Test Set 11
ECAT Statistics Test Set 10
ECAT Statistics Test Set 9

Mustansar KhanLast Updated: April 19, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

ECAT Chemistry Liquids Test Online

Chemistry Liquids MCQS Online Test

ECAT Chemistry Liquids Chapter Online Test

ECAT Chemistry Liquids Test

Chemistry

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply

Chemistry Liquids MCQS Online Test

ECAT Chemistry Liquids Chapter Online Test

ECAT Chemistry Liquids Test

Chemistry

You Might Also Like

Mustansar Khan

Your Related

ECAT Chemistry Forms of Matter Test Online

ECAT Statistics Test Set 17

ECAT English Correction Test Online

ECAT English Antonyms 4 Online Test

ECAT English Spotting Errors 8 Online Test

ECAT Statistics Test Set 9

Leave a Reply Cancel reply