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Elements, Compounds and Mixtures CHEMISTRY - Elements, Compounds and Mixtures

ICSE - STD 7 - CHEMISTRY (ICSE - English Medium). 98 questions in this chapter.

Question types

Elements, Compounds and Mixtures question types

98 questions across 8 question groups — pick any mix to generate a CHEMISTRY paper with step-by-step answer keys.

98
Questions
8
Question groups
5
Question types
Sample Questions

Elements, Compounds and Mixtures questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 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: A.

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Q 2MCQ1 Mark
In chromatography the filter paper is
  • ✓
    stationary phase
  • B
    mobile phase
  • C
    mixture
  • D
    none of the above

Answer: A.

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Q 3MCQ1 Mark
Example of a homogeneous mixture is
  • ✓
    tap water
  • B
    distilled water
  • C
    sand and water
  • D
    water and oil

Answer: A.

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Q 4MCQ1 Mark
Components of crude petroleum can be separated by
  • A
    distillation
  • B
    evaporation
  • C
    filtration
  • ✓
    fractional distillation

Answer: D.

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Q 5MCQ1 Mark
A pure liquid is obtained from a solution by :
  • A
    evaporation
  • ✓
    distillation
  • C
    Alteration
  • D
    crystallisation

Answer: B.

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Q 16[3 Mark Question Answer]3 Marks
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
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Q 17[3 Mark Question Answer]3 Marks
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Fractional distillation :
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Q 18[3 Mark Question Answer]3 Marks
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
By using a separating funnel
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Q 19[3 Mark Question Answer]3 Marks
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Solvent extraction method
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Q 20[3 Mark Question Answer]3 Marks
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Sedimentation and decantation
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Q 21[5 Mark Question Answer]5 Marks
Name the process by which the components of following mixtures can be separated.
  1. Iron and sulphur
  2. Ammonium chloride and sand
  3. Common salt from sea water
  4. Chaff and grain
  5. Water and mustard oil
  6. Sugar and water
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Q 34Match The Following.4 Marks
Match the columns.
Column A Column B
1. To separate grain from chaff a. filtration
2. To seperat sawdust from water b. sedimentation and decantation
3. To separate iodine from sodium chloried c. winnowing
4. To separate iron fillings from sand d. sublimation
5.It is used to separate sand and water e.magnetic separation
f. handpiicking
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