Matter in Our Surroundings

Class 9 · Science

94 questions30 easy32 medium32 hard

Sample Questions

Q1.An iron almirah (cupboard) is a solid at room temperature because:

  • AIt is heavy
  • BIron's melting point is much higher than room temperature and interparticle forces are very strong
  • CIron is shiny
  • DIron is a metal

Q2.Which of the following has the highest kinetic energy of particles?

  • AIce
  • BWater
  • CSteam
  • DAll have equal kinetic energy

Q3.Clothes dry faster on a windy day because:

  • AWind is hot
  • BWind carries away water vapour, decreasing humidity near the clothes
  • CWind squeezes water out of clothes
  • DWind heats the clothes

Q4.To convert temperature from Celsius to Kelvin scale, we:

  • ASubtract 273
  • BAdd 273
  • CMultiply by 273
  • DDivide by 273

Q5.When acetone is poured on the palm, it feels cold because:

  • AAcetone is naturally cold
  • BAcetone reacts with skin
  • CAcetone particles gain energy from the palm and evaporate, causing cooling
  • DAcetone freezes on the palm

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Change of State of MatterCharacteristics of Particles of MatterCompression of GasesDensityDiffusionEffect of Pressure on State of MatterEvaporationFactors Affecting EvaporationInterconversion of StatesLatent HeatMelting and Boiling PointPhysical Nature of MatterStates of Matter - Solid, Liquid, GasSublimation and DepositionTemperature and Kinetic Energy

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