Question

Hydration of acetylene to ethanal is catalysed by

• A. $Ba^{2+}$
• B. $Na^+$
• C. $Li^+$
• D. None

Answer 1

Answer: (A)

$Ba^{2+}$

Answer 2

$\underset{\text{Acetylene}} {CH \equiv CH} + H_2O {->[Ba^{2+}]}[CH_2 = CHOH]$ ${->} \underset{\text{Ethanal}}{CH_3CHO}$