1 mole alcohol reacts with Na to give what weight of hydrogen?

Options

A. 1 g
B. 2 g
C. 3 g
D. 3.5 g

Answer

A

Explanation

`{:(2C_(2)H_(5)OH+2Na rarr 2C_(2)H_(5)ONa+H_(2)),(" 2 mol 1 mol"),(" 1 mol "(1)/(2)"mol"):}`
The weight of `(1)/(2)` mol `H_(2)=(2)/(2)g=1g`
Thus, 1 g `H_(2)` is produced when 1 mole of alcohol reacts with Na.