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Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?
CBSE | Chemistry | Class 10 | Exercise 1 | Lakhmir Singh | Metals and Non Metals
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?

Solution:

The two metals that react aggressively with cold water are sodium and potassium.

Three points to consider:

  1. The reaction is exothermic, which means it produces a lot of heat.

2.Hydrogen is produced.

  1. There is a small explosion with a pop sound.

If the gas evolved is hydrogen gas, a pop sound will be heard.

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