Activity 3.9 NCERT Class 10 Science, Metals and Non-metals

Activity 3.9 NCERT Class 10 Science, Chapter 3 Metals and Non-metals

Brief procedure:

Activity 3.9 asks us to burn various metals and observe their flame.

activity 3.9 science class 10
Burning of copper
Observation: 

Not all metals burn easily, Copper and aluminium take time to burn.

Flame colour:

Sodium: Yellow

Magnesium: White

Aluminium: Silver white

Copper :blue flame

Solubility: 

Metal oxides from metal hydroxide with water, so they are soluble in water. Beryllium and magnesium are exceptions as they are slightly soluble in water.

Metal oxide + H2O(l) ———> Metal Hydroxide.

Explanation:

Metals are highly reactive elements. They react with oxygen readily to form metal oxides. Highly reactive metals like lithium, sodium, potassium, beryllium, magnesium react spontaneously. Other metals like Aluminum, copper take time to burn. It produces a specific flame colour. Many times flame colour is used to find the constituent of the substance.

Metal + O2(g) ———> Metal oxide(s)

Inference/conclusion: 

Metals on the heating burn to produce its oxides. During this process, they produce characteristic flames.

Next: See how various metals react with water. Activity 3.10.

See also: The reaction of oxides of metal and non-metal with water, Activity 3.8.

Ref: Flame test Wikipedia.

3 thoughts on “Activity 3.9 NCERT Class 10 Science, Metals and Non-metals”

  1. Very good Expalination……
    Very much helpfull also but try to write in proper bookish format like:-
    AIM:-
    Materials required :-
    Procedure:-
    Observation:-
    Conclusion:-
    Do these improvements and this would be very much helpful for students that’s it !!!

  2. It is very good but if you write it in a proper format like
    Aim :
    Materials Required :
    PROCEDURE :
    Observation :
    Inference / Conclusion :

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