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
Burning of candle is
  • A
    Chemical change
  • B
    Neither physical and chemical change
  • C
    Physical change
  • D
    Both physical and chemical change
    Correct
2
Which one is a periodic change
  • A
    Dissolving sugar in water
  • B
    Melting of ice
  • C
    Rusting of iron
  • D
    Change in season
    Correct
3
Souring of milk is a
  • A
    Physical change
  • B
    Periodic change
  • C
    Desirable change
  • D
    Undesirable change
    Correct
4
In a chemical change
  • A
    Energy change do not occur
  • B
    Energy is either absorbed or given out
    Correct
  • C
    Energy is given out
  • D
    Energy is always absorbed
5
The product formed by dissolving a substance into another is called
  • A
    Compound
  • B
    Solvent
  • C
    Solution
    Correct
  • D
    Solute
6
Rotation of fan blade is a
  • A
    Periodic change
    Correct
  • B
    Chemical change
  • C
    Physical change
  • D
    Slow change
7
The process of converting gas into liquid is called
  • A
    Evaporation
  • B
    Condensation
    Correct
  • C
    Cooling
  • D
    Freezing
8
Chemical changes are
  • A
    Always are irreversible
    Correct
  • B
    Mostly irreversible
  • C
    Mostly reversible
  • D
    Always reversible
9
When food get spoiled, it produce foul smell this is a
  • A
    Desirable change
  • B
    Physical change
  • C
    Chemical change
    Correct
  • D
    Periodic change
10
In chemical change ______________ takes place.
  • A
    Evolution of gas, change in colour or change in shape
  • B
    Evolution of gas, change in colour or change in temperature
    Correct
  • C
    Change in state, change in colour or change in shape
  • D
    Temporary change in colour or change in temperature
11
Ozone layer in troposphere protect us from
  • A
    Ultra violet radiation
    Correct
  • B
    Acid rain
  • C
    Visible radiation
  • D
    Infrared radiation
12
Which of the following method is used to prevent rusting?
  • A
    Washing and cleaning
  • B
    Painting and oiling
    Correct
  • C
    All of the above
  • D
    Acidifying and scrapping
13
Photosynthesis is carried out by green plants, it is a
  • A
    Undesirable change
  • B
    Chemical change
    Correct
  • C
    Temporary change
  • D
    Physical change
14
The chemical name of Baking soda is
  • A
    Calcium carbonate
  • B
    Sodium hydrogen carbonate
    Correct
  • C
    Sodium carbonate
  • D
    Calcium hydrogen carbonate
15
The changes in which only _________________ properties are changed are called physical changes.
  • A
    Chemical
  • B
    Structural
  • C
    Natural
  • D
    Physical
    Correct