NCERT Class X Science Class: Chapter – 1. Chemical Reactions and Equations – Part-10 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 44:

You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute . In which of the above containers these solutions can be kept?

Answer:

  • When solutions are kept in copper container
    • Dilute :
      • Copper does not react with dilute . Therefore, it can be kept.
    • Dilute
      • Nitric acid acts as a strong oxidising agent and reacts with copper vessel, therefore cannot be kept.
    • :
      • Zinc is more reactive than copper therefore, no displacement reaction occurs and hence can be kept.
    • :
      • Copper does not react with water. Therefore, can be kept.
  • When solutions are kept in aluminium containers
    • Dilute :
      • Aluminium reacts with dilute to form its salt and hydrogen is evolved. Therefore, cannot be kept.
    • Dilute :
      • Aluminium gets oxidised by dilute to form a layer of and can be kept.
      • Aluminium being more reactive than zinc can displace zinc ion from the solution. Therefore, the solution cannot be kept.
    • :
      • Aluminium does not react with cold or hot water. Therefore, water can be kept.
      • Aluminium is attacked by steam to form aluminium oxide and hydrogen