Q. 525.0( 5 Votes )

The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors. (a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?

Answer :

(a) Metal, M is Sodium (Na).

(b) Solution S is Sodium hydroxide solution (NaOH solution). It is Alkaline.

(c) Gas G is Hydrogen (H2).

(d) 2Na + 2H2O 2NaOH + H2

(e) The reaction is Exothermic.

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