Class 6 Changes Around Us CBSE Questions & Answers

Class 6 · Changes Around Us

This is Science Class 6 Changes around Us CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which group of change included only chemical change?
  • A
    Burning of paper, melting of ice and rusting of iron
  • B
    Dissolving of sugar, burning of paper and rusting of iron
  • C
    Burning of paper, rusting of iron and ripening of fruits
    Correct
  • D
    Melting of ice, burning of paper and rusting of iron
2
Copper sulphate + iron = Iron sulphate +__________?
  • A
    Iron oxide
  • B
    Copper sulphate
  • C
    Copper oxide
  • D
    Copper
    Correct
3
Vinegar is aqueous solution of
  • A
    Sulphuric acid
  • B
    Ethyl alcohol
  • C
    Citric acid
  • D
    Acetic acid
    Correct
4
Mixture of ice and common salt is called
  • A
    Adding mixture
  • B
    Melting mixture
  • C
    Freezing mixture
    Correct
  • D
    Freezing complex
5
A film of brownish substance on the iron articles left open in humid condition is called
  • A
    Musk
  • B
    Husk
  • C
    Flasks
  • D
    Rust
    Correct
6
In Chemical reaction, reactants change into
  • A
    Compound
  • B
    Product
    Correct
  • C
    Mixture
  • D
    Complex
7
In a chemical change
  • A
    Energy is given out
  • B
    Energy change do not occur
  • C
    Energy is always absorbed
  • D
    Energy is either absorbed or given out
    Correct
8
Rusting of iron is
  • A
    Reversible change
  • B
    Physical change
  • C
    Fast change
  • D
    Irreversible change
    Correct
9
Which one is an example of slow change
  • A
    Melting of ice
  • B
    Melting of wax
  • C
    All of above
  • D
    Ripening of fruit
    Correct
10
Rotation of fan blade is a
  • A
    Chemical change
  • B
    Periodic change
    Correct
  • C
    Slow change
  • D
    Physical change
11
Two essential condition for rusting of iron is
  • A
    Hydrogen and oxygen
  • B
    Air and moisture
    Correct
  • C
    Water and low temperature
  • D
    Water and carbon dioxide
12
Which of the following is a reversible change?
  • A
    Germination of seed
  • B
    Melting of ice
    Correct
  • C
    Changing of milk into curd
  • D
    Burning of matchstick
13
Chemical changes are
  • A
    Always are irreversible
    Correct
  • B
    Mostly reversible
  • C
    Always reversible
  • D
    Mostly irreversible
14
In chemical changes
  • A
    Substance remain same
  • B
    Molecules of a substance change
    Correct
  • C
    Change is reversible
  • D
    Molecules of the substance do not change
15
Which of the following is an example of physical change?
  • A
    Ripening of fruit
  • B
    A bud turning into flower
  • C
    Boiling of water
    Correct
  • D
    Rusting of iron