Q. Which of the following represents correct formation reaction?

164 203 NTA AbhyasNTA Abhyas 2020 Report Error

A

$(C a)^{2 +} (a q) + C O_{3}^{2 -} (a q) \to (C a CO)_{3} (s)$

B

$4 A l (s) + 3 O_{2} (g) \to 2 (A l)_{2} O_{3} (s)$

C

$\frac{1}{2} H_{2} (g) \to H^{+} (a q) + 1 e^{-}$

D

$CO (g) + \frac{1}{2} O_{2} (g) \to (CO)_{2} (g)$

Solution:

Theory based