Question

24 baking soda reacts twice in the oven. a true b false

Explanation:

Baking soda (sodium bicarbonate, $\ce{NaHCO_3}$) reacts once in the oven when heated, decomposing into sodium carbonate, water, and carbon dioxide ($\ce{2NaHCO_3 \stackrel{\Delta}{=\!=\!=} Na_2CO_3 + H_2O + CO_2 \uparrow}$). The "double - acting" property (reacting twice, once with acid and once with heat) is for baking powder, not just baking soda in the oven context. So the statement is false.

Answer:

B. False