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?

a) Metal M is Sodium (Na), which is used as a coolant in nuclear reactors.

b) Solution S is a Sodium hydroxide (NaOH solution). It is alkaline in nature, turns red litmus to blue.

c) Gas G is Hydrogen gas (H2), which is lighter than air.

d)$2Na( s) +2H_{2} O( l)\rightarrow 2NaOH( aq) +H_{2}( g) \ +\ Heat$

e) The reaction is exothermic in nature as a lot of heat is evolved.
 

Updated on: 10-Oct-2022

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