Q. Which of the following is correct?
A) In the Castner’s process of sodium extraction, NaCl is used as an electrolyte.
B) Sodium reduces ${CO}_{2}$ to carbon.
C) Mg reacts with cold water and liberate hydrogen gas.
D) Magnalium is an alloy of Mg and Zn.
Explanation
(b)
Alkali metals are electropositive, hence they can reduce $CO_{2}.$
$\ \ \ \ \ \ \ \ \ \ \ \ \ 4Na + CO_{2}\ \rightarrow 2Na_{2}O + C$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.