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13 questions · timed · auto-graded

MCQ 11 Mark
Select the correct alternative from the choices given for the following statement: A set of mixture is
  • ink, honey, ice cream, milk
  • B
    tapwater, gold, common salt, alloy
  • C
    milk, brass, silver, honey
  • D
    butter, petroleum, tapwater, iron
Answer
Correct option: A.
ink, honey, ice cream, milk
ink, honey, icecream, milk
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MCQ 21 Mark
In chromatography the filter paper is
  • stationary phase
  • B
    mobile phase
  • C
    mixture
  • D
    none of the above
Answer
Correct option: A.
stationary phase
stationary phase
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MCQ 31 Mark
Example of a homogeneous mixture is
  • tap water
  • B
    distilled water
  • C
    sand and water
  • D
    water and oil
Answer
Correct option: A.
tap water
tap water
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MCQ 41 Mark
Components of crude petroleum can be separated by
  • A
    distillation
  • B
    evaporation
  • C
    filtration
  • fractional distillation
Answer
Correct option: D.
fractional distillation
fractional distillation
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MCQ 51 Mark
A pure liquid is obtained from a solution by :
  • A
    evaporation
  • distillation
  • C
    Alteration
  • D
    crystallisation
Answer
Correct option: B.
distillation
distillation
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MCQ 61 Mark
The different constituents of ink are separated by
  • A
    handpicking.
  • paper chromatography
  • C
    filtration
  • D
    magnetic separation
Answer
Correct option: B.
paper chromatography
paper chromatography
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MCQ 71 Mark
Fractional distillation is used to separate liquids having an appreciable difference in their $.........$
  • A
    size and shape
  • B
    solubility
  • boiling points.
  • D
    none of these
Answer
Correct option: C.
boiling points.
boiling points.
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MCQ 81 Mark
Loading is a process in which
  • impurities become heavy and sink to the bottom.
  • B
    impurities float on the top.
  • C
    impurities vaporize.
  • D
    none of these
Answer
Correct option: A.
impurities become heavy and sink to the bottom.
impurities become heavy and sink to the bottom.
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MCQ 91 Mark
During filtration the substance left behind on the filter paper is called $.......$
  • A
    distillate
  • B
    filtrate
  • C
    sublimate
  • residue
Answer
Correct option: D.
residue
residue
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MCQ 101 Mark
Winnowing is the method used to separate
  • chaff from grain.
  • B
    stones from rice
  • C
    oil from water
  • D
    salt from sand
Answer
Correct option: A.
chaff from grain.
chaff from grain.
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MCQ 111 Mark
The methods of separating components of a given mixture are based on the
  • physical properties and state of the components
  • B
    colour of the components only.
  • C
    state of the components
  • D
    none of these
Answer
Correct option: A.
physical properties and state of the components
physical properties and state of the components
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MCQ 121 Mark
Solutions are
  • A
    heterogeneous mixture
  • B
    compounds
  • homogeneous mixture
  • D
    elements
Answer
Correct option: C.
homogeneous mixture
homogeneous mixture
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MCQ 131 Mark
The constituents of a mixture are present in a fixed ration.
  • A
    a fixed ratio
  • a variable ratio
  • C
    the ratio of $2:1$
  • D
    none of these
Answer
Correct option: B.
a variable ratio
a variable ratio
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MCQ - CHEMISTRY STD 7 Questions - Vidyadip