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14 questions · timed · auto-graded

MCQ 11 Mark
Circle the odd one out. Give reason for your choice
  • Inflating a balloon
  • B
    popping a balloon
  • C
    fading of wall paint
  • D
    burning of kerosene
Answer
Correct option: A.
Inflating a balloon
Inflating a balloon
Reason: Inflating a balloon is reversible change. Other three are irreversible changes.
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MCQ 21 Mark
Circle the odd one out. Give reason for your choice
  • Rotting of an egg
  • B
    condensation of water vapour
  • C
    trimming of hair
  • D
    Ripening of fruit
Answer
Correct option: A.
Rotting of an egg
Rotting of an egg.
Reason: Rotting of an egg is undesirable change. Other three are desirable changes.
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MCQ 31 Mark
Circle the odd one out. Give reason for your choice
  • A
    Glowing of a bulb
  • B
    lighting of a Candle
  • breaking of a coffee mug
  • D
    curdling of milk
Answer
Correct option: C.
breaking of a coffee mug
Breaking of a coffee mug
Reason: Breaking of a coffee mug is undesirable change. Other three are desirable changes.
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MCQ 41 Mark
Circle the odd one out. Give reason for your choice
  • A
    Growth of a child
  • B
    Blinking of eye
  • Rusting
  • D
    Germination of a seed
Answer
Correct option: C.
Rusting
Rusting
Reason: Rusting is undesirable change. Others three are desirable changes.
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MCQ 51 Mark
Air pollution leading to acid rain is a
  • A
    reversible change
  • B
    fast change
  • C
    natural change
  • human made change
Answer
Correct option: D.
human made change
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MCQ 61 Mark
Out of the following an example of a desirable change is
  • A
    rusting
  • change of seasons
  • C
    earthquake
  • D
    flooding
Answer
Correct option: B.
change of seasons
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MCQ 71 Mark
Formation of curd from milk is
  • A
    a reversible change
  • B
    a fast change
  • an irreversible change
  • D
    an undesirable change
Answer
Correct option: C.
an irreversible change
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MCQ 81 Mark
Drying of wet clothes in air is an example of
  • A
    Chemical change
  • B
    Undesirable change
  • Irreversible change
  • D
    physical change
Answer
Correct option: C.
Irreversible change
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MCQ 91 Mark
When ice melts to form water, change occurs in its
  • A
    position
  • B
    colour
  • physical state
  • D
    composition
Answer
Correct option: C.
physical state
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MCQ 101 Mark
The blackening of the Silver anklet is a $($an$)$
  • Irreversible change
  • B
    Temporary change
  • C
    Short term change
  • D
     Periodical change
Answer
Correct option: A.
Irreversible change
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MCQ 111 Mark
_______ change is a temporary change
  • Physical
  • B
    Chemical
  • C
    Undesirable
  • D
    slow
Answer
Correct option: A.
Physical
Physical
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MCQ 121 Mark
Evaporation of water from lakes and river
  • A
    Slow change
  • B
    Fast change
  • C
    Natural change
  • Both $(a)$ and $(b)$
Answer
Correct option: D.
Both $(a)$ and $(b)$
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MCQ 131 Mark
_______ is the process in which something becomes different from what it was earlier.
  • A
    Classification
  • B
    Composition
  • C
    Position
  • Change
Answer
Correct option: D.
Change
Change
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MCQ 141 Mark
Water changes into ice on cooling are called as
  • A
    Melting
  • B
    Vaporisation
  • C
    Condensation
  • Freezing
Answer
Correct option: D.
Freezing
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MCQ - Science STD 6 Questions - Vidyadip