12 MCQs (Each 1 Mark)

What is the basic unit that makes up all matter?

  • a) Molecule
  • b) Electron
  • c) Atom
  • d) Proton

Which state of matter has particles arranged in a fixed, orderly pattern?

  • a) Gas
  • b) Liquid
  • c) Solid
  • d) Plasma

What property of gases allows them to be compressed easily?

  • a) High density
  • b) Strong intermolecular forces
  • c) Large empty spaces between molecules
  • d) Rigid structure

What happens when heat is added to a solid?

  • a) It remains a solid
  • b) It melts into a liquid
  • c) It turns into plasma
  • d) It disappears

In which state of matter do free electrons and ionized particles exist?

  • a) Liquid
  • b) Gas
  • c) Solid
  • d) Plasma

Which process involves the transformation of a liquid into a gas?

  • a) Condensation
  • b) Evaporation
  • c) Freezing
  • d) Sublimation

Which state of matter has a definite volume but takes the shape of its container?

  • a) Solid
  • b) Liquid
  • c) Gas
  • d) Plasma

What happens when water reaches its boiling point?

  • a) It turns into a solid
  • b) It turns into gas
  • c) It stays liquid
  • d) It turns into plasma

Why can liquids flow but solids cannot?

  • a) Liquids have stronger bonds between molecules
  • b) Solids have fixed molecules, while liquids have loosely arranged molecules
  • c) Solids are less dense than liquids
  • d) Liquids have lower energy than solids

Which state of matter has the highest energy level?

  • a) Gas
  • b) Plasma
  • c) Liquid
  • d) Solid

How is plasma different from gas?

  • a) Plasma is made of neutral atoms
  • b) Plasma contains charged particles (ions and free electrons)
  • c) Plasma has less energy than gas
  • d) Plasma is a type of solid

What is the term used for the direct transition from solid to gas?

  • a) Melting
  • b) Evaporation
  • c) Condensation
  • d) Sublimation

11 Short Questions (Each 3 Marks)

Define chemistry and explain its connection to matter.

Describe the properties of plasma and where it can be found.

Explain why gases have lower density compared to solids and liquids.

What happens to molecules of a liquid when it is cooled to its freezing point?

How does the motion of particles change as matter moves from solid to gas?

What is compressibility? Compare the compressibility of gases and liquids.

Why do different states of matter exist? Explain with an example.

Describe the concept of Bose-Einstein Condensate (BEC) and its significance.

How can temperature and pressure influence the state of matter?

What are liquid crystals, and where are they used in everyday life?

How do physical and chemical changes differ? Give an example of each.

4 Long Questions (Each 5 Marks)

Explain the particle arrangement in solids, liquids, and gases, and describe how their properties differ.

Describe the process of phase transitions (melting, freezing, evaporation, condensation, sublimation) with examples.

Discuss how matter changes states due to energy changes, and explain the role of temperature and pressure.

Compare and contrast the properties of plasma and Bose-Einstein Condensate (BEC).

This test includes fresh questions while maintaining a focus on key concepts. Let me know if you'd like any changes! 😊