NCERT Class X Science Class: Chapter –1. Chemical Reactions and Equations – Part-10

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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:

  1. When solutions are kept in copper container

    1. Dilute :

      Copper does not react with dilute . Therefore, it can be kept.

    2. Dilute

      Nitric acid acts as a strong oxidising agent and reacts with copper vessel, therefore cannot be kept.

    3. :

      Zinc is more reactive than copper therefore, no displacement reaction occurs and hence can be kept.

    4. :

      Copper does not react with water. Therefore, can be kept.

  2. When solutions are kept in aluminium containers

  3. Dilute :

    Aluminium reacts with dilute to form its salt and hydrogen is evolved. Therefore, cannot be kept.

  4. Dilute :

    Aluminium gets oxidised by dilute to form a layer of and can be kept.

  5. Aluminium being more reactive than zinc can displace zinc ion from the solution. Therefore, the solution cannot be kept.

  6. :

    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