Liquids Quiz - CBSE Class 12 Chemistry
Free practice quiz: Liquids (CBSE Class 12 Chemistry). 18 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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Which of the following properties is NOT characteristic of liquids?
- Definite volume
- Indefinite shape
- High compressibility
- Intermolecular forces
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Answer: C. High compressibility
Liquids have a definite volume but take the shape of their container. They are relatively incompressible due to the close proximity of their molecules.
What is the effect of temperature on the viscosity of a liquid?
- Viscosity increases with increasing temperature
- Viscosity decreases with increasing temperature
- Viscosity remains unchanged with increasing temperature
- Viscosity is independent of temperature
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Answer: B. Viscosity decreases with increasing temperature
Higher temperatures provide more kinetic energy to overcome intermolecular forces, thus reducing resistance to flow and lowering viscosity.
Explain the role of hydrogen bonding in the properties of water.
- Hydrogen bonding makes water less dense as a solid
- Hydrogen bonding makes water more volatile
- Hydrogen bonding lowers the boiling point of water
- Hydrogen bonding increases the viscosity of water
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Answer: A. Hydrogen bonding makes water less dense as a solid
Hydrogen bonds in ice create a more open structure compared to liquid water, leading to lower density.
Which property of liquids is responsible for the formation of meniscus in a capillary tube?
- Viscosity
- Vapor pressure
- Surface tension
- Boiling point
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Answer: C. Surface tension
The meniscus is formed due to the balance between adhesive and cohesive forces which are related to the surface tension.
Explain why liquids are less compressible than gases.
- Liquids have stronger intermolecular forces
- Liquids have higher densities
- Liquids have lower kinetic energies
- Liquids are composed of larger molecules
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Answer: A. Liquids have stronger intermolecular forces
The close proximity of molecules in liquids, due to stronger intermolecular forces, leaves little space for compression compared to gases.