Most Important Liquids Quiz Test Online

Liquids Quiz Test Online

Liquids Test. 1

1 / 20

Which of the following has highest volatility?

Water

Ethyl alcohol

Diethyl ether

Ethylene glycol

2 / 20

The conversion of vapours back to liquid is called:

Crystallization

Evaporation

Condensation

Vapourization

3 / 20

Which of the following is false for evaporation?

surface phenomenon

exothermic

continuous

causes cooling

4 / 20

Liquids have no definite shape because:

All statements are correct

Liquid molecules have kinetic energy less than gases

The intermolecular forces in liquids are weaker than in solids

The molecules of liquid are in constant motion, sliding over each other

5 / 20

The boiling point of water would be highest at:

Siachin

Gwadar

Mount Everest

Murree

6 / 20

The dominant Van der Waals force in NH₃ is:

Dipole-induced dipole forces

Dipole-dipole forces

London dispersion forces

Hydrogen bonding

7 / 20

7) Nature of bonding affects the properties like:

Solubility

Melting, boiling points and isomerism

Reaction kinetics

All of these

8 / 20

Vapour pressure of water at 0°C is 4.579 torr, and at 10°C it is 9.209 torr, so increase in vapour pressure from 0 C to 10 C is 4.630 torr What will be the change in vapour pressure from 90°C to 100°C?

< 4.630 torr

> 4.630 torr

4.630 torr

v.p remains same at all temperatures

9 / 20

The vapour pressure of water at 100°C is:

760 mm Hg

1489 mm Hg

55 mm Hg

355 mm Hg

10 / 20

10)

Which of the following has the highest vapour pressure?

Mercury

Water

Isopentane

Glycerol

11 / 20

11)

Why does CHCl₃ (Chloroform) exist in a liquid state?

Dipole-dipole and London dispersion forces

Dipole-induced dipole forces

Hydrogen bonding

dipole-dipole forces

12 / 20

12)

Why do liquids take the shape of their container?

Liquids are highly compressible

Liquids do not have a definite shape

Liquid molecules can slide over each other

Liquids do not have a definite volume

13 / 20

13)

The attractive forces between the partial positive end of one molecule and the partial negative end of another molecule are called:

London dispersion forces

Debye forces

Ion-dipole forces

Dipole-dipole forces

14 / 20

14)

Which of the following has the strongest intermolecular forces?

Methane (CH₄)

Hydrogen (H₂)

Iodine (I₂)

Chlorine (Cl₂)

15 / 20

15)

Which of the following is the correct order of increasing intermolecular interactions?

Hydrogen bonding, London forces, Dipole-dipole

London forces, Dipole-dipole, Hydrogen bonding

London forces, Hydrogen bonding, Dipole-dipole

Dipole-dipole, London forces, Hydrogen bonding

16 / 20

16)

Strong dipole-dipole forces among liquid molecules are responsible for:

Very high heat of vaporization

Very low boiling point

Very low heat of vaporization

All are correct

17 / 20

17)

Which of the following has the highest boiling point?

CHCl₃

NH₃

Br₂

18 / 20

18)

Why is propanone (acetone) miscible in water?

All of these

Both are polar molecules

Dipole-dipole attraction exists between them

Hydrogen bonding occurs between them

19 / 20

19)

Which forces are present between all types of atoms and molecules?

London dispersion forces

Dipole-induced dipole forces

Hydrogen bonding

Dipole-dipole forces

20 / 20

20)

What type of force exists between ions and water molecules?

London dispersion forces

Dipole-induced dipole forces

Ion-dipole forces

Dipole-dipole forces

Your score is

The average score is 55%

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Liquids Test. 2

1 / 20

1) The rate of evaporation of a liquid does not depend on:

All of these

Surface area of the liquid

Intermolecular forces

Temperature

2 / 20

2) Hydrogen bonding is involved in:

Cleansing action of detergents

Solubility

Biological molecules

All of the above

3 / 20

3) When two ice cubes are pressed against each other, they stick due to:

Ionic bond formation

Hydrogen bond formation

Covalent attraction

Metallic bond formation

4 / 20

4) Evaporation is designated as a cooling process because of the reason

It is exothermic process

High energy molecules leave behind the low energy molecules and cause cooling

It is a surface phenomenon

All of the above

5 / 20

5) Lower alcohols are soluble in water because:

Dipole-induced dipole forces

Low electronegativity difference between C and H

All of the above

Intermolecular hydrogen bonding

6 / 20

6) When ammonia is dissolved in water, the number of hydrogen bonds formed by ammonia is:

7 / 20

7) If we provide very high amount of heat to a liquid its boiling point will

Decrease

Remains constant

There will be no boiling

Increase

8 / 20

8) When water freezes at 0°C, its density decreases due to:

Change in bond length

Cubic structure of ice

Change in bond angles

Empty space present in the structure of ice

9 / 20

9) Vapour pressure of a liquid depends on:

Volume of the liquid

Temperature and intermolecular forces

Humidity of the liquid in the air

Surface area and temperature only

10 / 20

10) The distillation of a solution under reduced pressure is called:

Distillation

Destructive distillation

Vacuum distillation

Fractional distillation

11 / 20

11) A pressure cooker reduces cooking time because:

A large flame is used

The boiling point of water rises

Vapour pressure of the liquid decreases

Heat is uniformly distributed

12 / 20

12)

To maintain the boiling point of water at 110°C, the pressure should be:

Between 760 torr and 1200 torr

765 torr

Any pressure value

Between 200 torr and 760 torr

13 / 20

13) At 1 atm pressure, liquid 1 has a boiling point lower than liquid 2. What can we predict about both liquids?

All of the above

Liquid 1 has a higher vapour pressure than liquid 2

Liquid 1 has weaker intermolecular forces of attraction than liquid 2

Liquid 1 is more volatile than liquid 2

14 / 20

14) The strength of hydrogen bonding is:

20 times less than an ionic bond

20 times more than a covalent bond

20 times more than an ionic bond

20 times less than a covalent bond

15 / 20

15) Which one of the following would cause severe burning?

Steam at 100°C

Boiling water at 90°C

Boiling water at 80°C

Water at 20°C

16 / 20

16) Molar heat of vaporization of water is:

140.6 kJ mol⁻¹

14.6 kJ mol⁻¹

40.6 kJ mol⁻¹

Zero

17 / 20

17) The correct order of boiling points of the given liquids is: (MDCAT 2012)

H₂O > HF > HCl > NH₃

HF > H₂O > HCl > NH₃

HF > H₂O > NH₃ > HCl

H₂O > HF > NH₃ > HCl

18 / 20

18) Which of the following can form hydrogen bonding among its molecules more prominently?

CH₃COOH

CHCl₃

CH₃OH

All of these

19 / 20

19) The strongest hydrogen bond is:

N—H

O—H

F—H

O—F

20 / 20

20) The boiling point of a liquid is the temperature at which:

The vapour pressure of the liquid is greater than the atmospheric pressure

The vapour pressure of the liquid is equal to the intermolecular forces of the liquid molecules

The vapour pressure of the liquid is less than the atmospheric pressure

The vapour pressure of the liquid is equal to the atmospheric pressure

Your score is

The average score is 68%

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Liquids Test. 3

1 / 21

1) An intermolecular force of attraction X is relatively stronger than the other intermolecular forces, it stabilizes the α-helix and β-pleated sheet structures of proteins. The double helical structure of DNA is also stabilized by this force of attraction. Identify X. (MDCAT 2019)

Hydrogen bonding

van der Waals forces

Dipole-dipole attraction

Ionic interactions

2 / 21

2) In the crystal lattice of ice, each oxygen atom of a water molecule is attached to: (MDCAT 2014)

Four hydrogen atoms

Three hydrogen atoms

Two hydrogen atoms

One hydrogen atom

3 / 21

3) SO₂ and CO₂ are both tri-atomic molecules, but the heat of vaporization of SO₂ is greater due to: (MDCAT 2020)

SO₂ is an ionic molecule

Greater size of SO₂

SO₂ is polar, and CO₂ is non-polar

High electronegativity of S

4 / 21

4) The DNA molecule is double-stranded, in which two chains of DNA are twisted around each other by: (MDCAT 2011)

Dative bonds

Hydrogen bonds

Covalent bonds

Van der Waals forces

5 / 21

5) What is the reason that ice at 0°C occupies more volume than water?

Ionic bonds

Debye forces

Intermolecular forces

Empty spaces in the structure

6 / 21

6) Ice is less dense than water at: (MDCAT 2014)

0°C

4°C

2°C

-4°C

7 / 21

7) Conduction in metals involves the relatively free movement of: (MDCAT 2017)

Atoms

Electrons

Ions

Molecules

8 / 21

8) Which hydrogen bond is stronger than others? (MDCAT 2015)

N—H⋯N—H

F—H⋯F—H

N—H⋯O—H

O—H⋯O—H

9 / 21

9) Which of the following substances exhibits hydrogen bonding? (MDCAT 2017)

NH₃

SiH₄

H₂S

10 / 21

10) At higher altitudes, the boiling point of water is less than 100°C due to: (ETEA 2019)

Higher atmospheric pressure

No change in atmospheric pressure

Weak hydrogen bonding

Lower atmospheric pressure

11 / 21

11) The boiling point of water is higher than petrol because intermolecular forces in water are: (MDCAT 2011)

The same as in petrol

Weaker than petrol

Negligible

Stronger than petrol

12 / 21

12) In an H-F bond, the electronegativity difference is 2.0. What is the type of this bond? (MDCAT 2019)

Non-polar covalent bond

Polar covalent bond

Co-ordinate covalent bond

π (pi) bond

13 / 21

13) Steam causes severe burns compared to boiling water because: (ETEA 2019)

Freely moving molecules

Absence of hydrogen bonding

Statement is incorrect

High latent heat of vaporization

14 / 21

14) Which of the following is not a molecular solid? (MDCAT 2020)

Sulphur

Carbon dioxide

Bromine

Phosphorus

15 / 21

15) Which of the following substances exhibits hydrogen bonding? (MDCAT 2019)

H₂S

NH₃

SiH₄

16 / 21

16) According to Watson and Crick’s model, the double helix structure of DNA is held together by: (MDCAT 2019)

Ionic bonding

Hydrogen bonding

Dipole-induced dipole forces

van der Waals forces

17 / 21

17) The helical structure of DNA is also stabilized by: (MDCAT 2019)

Ionic interactions

van der Waals forces

Dipole-dipole attraction

Hydrogen bonding

18 / 21

18) Which type of force is present in gasoline? (MDCAT 2015)

Dipole-induced dipole forces

Hydrogen bonding

London dispersion forces

Dipole-dipole forces

19 / 21

19) Water has maximum density at: (NUMS 2019)

4°C

0°C

-4°C

1°C

20 / 21

20) At 1489 mmHg, water will boil at: (NUMS 2019)

90°C

100°C

120°C

110°C

21 / 21

21) Which of the following has the lowest vapor pressure at 20C? (MDCAT 2021)

Carbon tetrachloride

Water

Diethyl ether

Chlorofoam

Your score is

The average score is 72%

Most Important Liquids Quiz Test Online

Liquids Quiz Test Online

Other Chemistry Topics Quiz

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Liquids Quiz Test Online

Other Chemistry Topics Quiz

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