A) In the Castners process of sodium extraction, \[\text{NaCl}\]is used as an electrolyte
B) Sodium reduces \[\text{C}{{\text{O}}_{2}}\]to carbon
C) Mg reacts with cold water and liberate hydrogen gas
D) Magnalium is an alloy of Mg and Zn
Correct Answer: B
Solution :
Alkali metal are electropositive, hence they can reduce \[\text{C}{{\text{O}}_{\text{2}}}\text{.}\] \[4Na+C{{O}_{2}}\to 2N{{a}_{2}}O+C\]
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