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Physical and Chemical Changes

Test your knowledge of physical and chemical changes, including reactions, heat transfer, and material properties

18 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

When carbon dioxide is passed through lime water , then lime water becomes ( )

  1. milky
  2. shiney
  3. silvery
  4. Golden yellow
Question 2 Multiple Choice (Single Answer)

A change in which a substance undergoes changes in its physical properties is called

  1. Chemical change
  2. physical change
  3. No change
  4. Biological change
Question 3 Multiple Choice (Single Answer)

Brown colour of the apple after cutting is ( )

  1. physical change
  2. chemical change
  3. no change
  4. biological change
Question 4 Multiple Choice (Single Answer)

The process of depositing a layer of one metal over another metal surface to protect it from rusting is called ( )

  1. Galvanisation
  2. Crystallisation
  3. amalgamating
  4. Neutralisation
Question 5 Multiple Choice (Single Answer)

Metal that is made by mixing iron with carbon, nickel and manganese is called ( )

  1. Stainless steel
  2. German silver
  3. Nichrome
  4. Eureka
Question 6 Multiple Choice (Single Answer)

For protecting iron pipes from corrosion, they are coated with ( )

  1. Zinc
  2. Copper
  3. Aluminium
  4. Silver
Question 7 Multiple Choice (Single Answer)

The process of obtaining Salt by the evaporation of sea water is called ( )

  1. Crystallisation
  2. Neutralisation
  3. Galvanisation
  4. Amalgamation
Question 8 Multiple Choice (Single Answer)

Thermos flask keeps hot liquid hot and cold liquid cold by

  1. Preventing heat loss
  2. Cooling
  3. Heating
  4. Using coolant
Question 9 Multiple Choice (Single Answer)

Blue colour of the copper sulphate solution changes to Green colour when an iron nail is dropped into it due to the formation of ( )

  1. Iron sulphate
  2. copper chloride
  3. Copper iron sulphate
  4. Iron chloride
Question 10 Multiple Choice (Single Answer)

Magnesium hydroxide, obtained when Magnesium oxide is dissolved in water, is ( )

  1. Base
  2. An acid
  3. an indicator
  4. a dissolving agent
Question 11 Multiple Choice (Single Answer)

Heat of sun reaches to earth by

  1. Convection
  2. Conduction
  3. Through air.
  4. Radiation
Question 12 Multiple Choice (Single Answer)

Conduction takes place in

  1. All of the above.
  2. Liquid only
  3. Gases only
  4. Solid only
Question 13 Multiple Choice (Single Answer)

Method of heat transfer in steel rod is

  1. Convection
  2. All of these
  3. Conduction
  4. Radiation
Question 14 Multiple Choice (Single Answer)

Temperature changes with change in

  1. Vibration
  2. Heat energy
  3. Velocity
  4. Magnitude
Question 15 Multiple Choice (Single Answer)

When Magnesium ribbon is burnt in candle flame it burns with ( )

  1. brilliant red light
  2. Brilliant yellow light
  3. Brilliant white light
  4. Brilliant Green light
Question 16 Multiple Choice (Single Answer)

A wooden spoon is dipped in cup of ice-cream, its other end

  1. Become cold by convection
  2. Become cold by radiation
  3. Does not become cold
  4. Become cold by conduction
Question 17 Multiple Choice (Single Answer)

When Magnesium ribbon is burnt in oxygen, the product obtained is ( )

  1. Magnesium chloride
  2. Magnesium sulphate
  3. Magnesium oxide
  4. Iron chloride
Question 18 Multiple Choice (Single Answer)

Which of the following is a insulator

  1. Copper rod
  2. Aluminium rod
  3. Air
  4. Graphite
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