A + B C + D Which type of reaction is this?
  • Reversibe
  • Irriversible
  • Forwardq
  • Backward
Burning of camphor is similar to
  • breaking of glass
  • burnng of wood and magnesium
  • burning of magnesium
  • burning of wood
Rust is
  • Iron Oxide
  • Oxygen
  • Water
  • Iron
Depositing one metal on another metal is
  • Physical Change
  • Galvanisation
  • Rusting
  • No answer
Which metal is generally used for galvanisation?
  • Magnesium
  • Aluminium
  • Zinc
  • Iron
What prevents the outer surface of potato from colouring?
  • Grease
  • Cold Water
  • Paint
  • Zinc
Is water melting a physical or chemical change?
  • Physical
  • Chemical
Is a burning candle a physical or chemical change?
  • Physical
  • Chemical
Is salt dissolving in water a physical or chemical change?
  • Physical
  • Chemical
What is the meaning of Irreversible ?
  • Something that can return to it's normal shape
  • Something that can't return to it's normal shape
What is the meaning of Reversible ?
  • Something that can't return ti it's normal shape
  • Something that can return to it's normal shape
A chemical change
  • doesn't really change much.
  • creates a new substance
  • is a change in the state of matter
Melting chocolate is what type of change?
  • Irreversible
  • Reversible
Cooking an egg is what type of change?
  • Irreversible
  • Reversible
When orange juice is frozen to make popsicles, can the popsicles change back to orange juice?
  • Yes
  • No
Is burning wood is what type of change?
  • Reversible
  • Irreversible
mixing baking soda and vinegar
  • physical change
  • chemical change
Define chemical change
  • An irreversible chemical reaction involving the rearrangement of the atoms of one or more substances
  • A reversible reaction
  • Chemicals become seperate
  • I don't know
Which is a chemical change?
  • Breaking glass
  • Baking a cake
  • Shredding paper
  • Melting ice
The picture shows an example of a ______________ change.
  • chemical
  • physical
  • irreversible
  • freezing
Which of these is NOT a reversible change?
  • Water to Ice
  • Juice to Popsicle
  • Cookie Dough to Cookie
  • Melting Chocolate
Every change has a cause. true or false
  • True
  • False
Which of these solids will melt?
  • paper
  • eraser
  • ice-cream
  • wood
When you blow into a balloon it will .........
  • change its size
  • change color
  • becomes soft
  • becomes hard
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
  • evaporation; chemical change
  • condensation; physical change
  • evaporation; physical change
  • condensation; chemical change
Cake batter baked in an oven
  • Chemical Change
  • Physical Change
Water freezing
  • Chemical Change
  • Physical Change
Freezing juice is an example of a(n) ________
  • physical change
  • chemical change
What type of change is the bursting of a cracker ?
  • Reversible change
  • Irreversible change
  • Physical change
  • None of these
What type of change is the lighting of a bulb?
  • Reversible change
  • Irreversible change
  • Chemical change
  • None of these
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