1.

Name two metals that vigrously react with cold water.Write any 3 observations

Answer»

Answer:

TWO METALS that react vigorously with cold water are are sodium and potassium

Explanation:

sodium sodium and potassium are are elements of group 1 which have there one valence electron in the outermost shell which could be released easily

hence they take part in reaction very very fastly in comparison to other metals even with cold water they react vigorously

in fact all the group 1 metals react vigorously with cold water because they all have one valence electron in the outermost shell

but AMONG the group when metals the most reactive is francium which is a radioactive alkali metal WHOSE lifespan is is 20 minutes.

when such metals are dropped into the water then hydrogen gas evolves up with hissing sound. the temperature of the container in which the reaction is is taking place becomes very hot. sometimes if the relative quantity of metal ADDED to the water is is more than a mini explosion could take place.

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