Explanation
The formula of carnallite mineral is KMgCl3·6(H2O). Hence the composition is KCl.MgCl2.6H2O
Fire extinguishers contain H2SO4, NaHCO3 and Na2CO3
Since NaHCO3 is an acid salt of H2CO3, it reacts with NaOH to form Na2CO3 and H2O.
NaHCO3 + NaOH → Na2CO3 + H2O
Mg2+ with the highest value of reduction potential is the weakest reducing agent and hence the strongest oxidising agent.
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