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 is an example of both physical as well as chemical changes?
  • A
    Melting of wax
  • B
    Burning of candle
    Correct
  • C
    Digestion
  • D
    Respiration
2
Painting of iron articles prevent the rusting because
  • A
    Paint is a reducing agent
  • B
    Air and water do not come in contact of surface
    Correct
  • C
    Paint absorbs the moisture
  • D
    Paint change oxygen into carbon dioxide
3
Rusting of iron is faster in coastal areas due to
  • A
    Cool air
  • B
    Salty water
    Correct
  • C
    Low temperature
  • D
    High humidity
4
The gas we use in kitchen is called LPG, which stands for
  • A
    Liquid petrol gas
  • B
    Liquefied permanent gas
  • C
    Liquefied purified gas
  • D
    Liquefied petroleum gas
    Correct
5
Anaerobic bacteria, digest animal waste and produce
  • A
    Bio gas
    Correct
  • B
    Sulpher dioxide gas
  • C
    Hydrogen gas
  • D
    Producer gas
6
LPG gas is liquefied by applying
  • A
    High pressure and low temperature
    Correct
  • B
    Low pressure and low temperature
  • C
    Low pressure and low temperature
  • D
    High pressure and high temperature
7
Burning of candle is
  • A
    Neither physical nor chemical change
  • B
    Both physical and chemical change
    Correct
  • C
    Physical change
  • D
    Chemical change
8
Dilute Sulphuric acid is used in laboratory by students because
  • A
    Dilute acid is highly reactive
  • B
    Concentrated acid is not reactive
  • C
    Concentrated acid is highly corrosive
    Correct
  • D
    Dilute acid reacts better
9
Which of the following statement is true for a physical change?
  • A
    More than one substance must be present
  • B
    It change a substance into different substance
  • C
    Burning is an example
  • D
    It alter the form and appearance of the substance
    Correct
10
Puneet added a spoon of salt in a glass of water and stirred it, the salt disappear. Which type of change is this?
  • A
    Biological change
  • B
    Physical change
    Correct
  • C
    No any change
  • D
    Chemical change
11
Which of the following is an example of physical change?
  • A
    Boiling of water
    Correct
  • B
    Ripening of fruit
  • C
    Rusting of iron
  • D
    A bud turning into flower
12
Which of the following may not be followed by a chemical reaction?
  • A
    Change in smell
  • B
    Change in colour
  • C
    Change in temperature
  • D
    Change in physical state and size
    Correct
13
When piece of paper is cut into small pieces, it cannot be change into original shape although it is physical change because
  • A
    Property of paper remain same
    Correct
  • B
    Size of paper reduced
  • C
    Colour of paper remained same
  • D
    Nature of paper changes
14
Do all physical properties change in physical changes?
  • A
    No, only change in shape takes place
  • B
    Yes, all physical properties changes
  • C
    Yes, only change in melting point takes place
  • D
    No, all physical properties may not change
    Correct
15
We use perfume on clothes as it smell nice. What kind of change is it?
  • A
    Reversible change
  • B
    Chemical change
  • C
    Temporary change
    Correct
  • D
    Permanent change