Alkali metals liberate `H_(2)` gas when they react with

Options

A. acetylene
B. alcohol
C. water
D. all of these

Answer

D

Explanation

Alkali metals, on account of large negative `E^(@)(M^(+)//M)`, are better reducing agents than hydrogen. Thus they react with compound containing acidic H atoms
`2M+HC-=Chto overset(+)(M)overset(-)(C)-=overset(-)(C)overset(+)(M)+H_(2)`
`2M+2C_(2)H_(5)OHto2CH_(3)CH_(2)overset(-)(O)overset(+)(M)+H_(2)`
`2M+2H-OHto2overset(+)(M)overset(-)(O)H(aq.)+H_(2)`.