ICSE Class 7 Chemistry Important Questions

Chemistry plays a significant role in meeting human wants for different materials geared toward raising the standard of life. This can be explained by the massive scale production of a spread of fertilisers, improved sorts of pesticides and pesticides. Learning chemistry is obligatory currently because it constitutes to be a critical subject in higher classes.ICSE Class 7 Chemistry Important Questions help you refresh all the essential topics you have learnt in class 7.

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The Important Questions of ICSE Class 7 Chemistry are given below:

  1. Choose the correct answer out of the four available choices given below each question.
    1. The____________ substances do not have their own definite shape and volume.
      1. crystal
      2. Solid
      3. Liquid
      4. Gaseous
    2. Metals react with dilute acids to liberate __________ gas.
      1. Sulphur
      2. Oxygen
      3. Hydrogen
      4. Chlorine
    3. A solution which cannot dissolve more of solute at a given temperature is called_____.
      1. Unsaturated solution
      2. Saturated solution
      3. True solution
      4. Colloid solution
  2. Give the chemical formula for the following:
    1. Caustic soda
    2. Nitric acid
    3. Lead nitrate
    4. Blue vitriol
    5. Vinegar
  3. Fill in the blanks and rewrite the sentences:
    1. Manganese dioxide acts as a _____ during the formation of oxygen.
    2. On burning a candle, _____ and ______ are formed.
    3. When ammonium chloride is dissolved in water, heat is ______ .
    4. A sublimable solid on heating turns into ______.
    5. Adding salt to water increases the ______ point of water.
  4. State whether True or False.
    1. Marble is hydrated calcium sulphate.
    2. Oxygen burns in an atmosphere of acetylene producing very high temperatures which are used for welding and cutting metals.
    3. Metals occur in nature in both free and combined states.
    4. Rusting is a slow oxidation process in which iron slowly reacts with the oxygen of the air in the presence of moisture.
    5. Water freezing into ice is an example of chemical change.
  5. Match the following:

    Solid ‘X’ to Liquid ‘Y’

    Liquefaction

    Liquid ‘X’ to its vapours ‘Z’

    Solidification

    ‘Z’ to ‘X’

    Melting

    ‘Y’ to ‘X’

    Boiling point

    The temperature at which ‘Y ‘changes to ‘Z’

    Vaporisation

  6. Write the valency and the symbols for the following elements:
    1. Oxygen
    2. Sulphur
    3. Bromine
    4. Chlorine
    5. Carbon
  7. Give the chemical name for the following:
    1. NaOH
    2. KOH
    3. NaHCO3
    4. CaO
    5. H3PO4
  8. Addition of curd to milk is a chemical change. Why?
  9. Explain why the Burning of sulphur powder is a chemical change.
  10. Explain the term catalyst and its types.
  11. Define Chemical equation.
  12. What are Reactants?
  13. What is meant by Products?
  14. Write a short note on a balanced equation.
  15. Explain Catalyst.
  16. Compare in tabular form properties of Solids, Liquids and Gases with respect to :
    1. Shape
    2. Volume
    3. Compressibility
    4. Diffusion
    5. Fluidity or Rigidity
  17. Define mixture.
  18. Explain the term atomicity in detail.
  19. Give the differences between elements and compounds.
  20. What are the different types of the mixture?

Practise This Question

When precipitation comes down to earth in liquid form, it is called ______.

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