1.

What is the quantity of hydrogen gas liberated when `46 g` sodium reacts with excess ethanol ? (Given atomic mass of `Na = 23`)A. `2.4 xx 10^(-3) kg`B. `2.0 xx 10^(-3) kg`C. `4.0 xx 10^(-3) kg`D. `2.4 xx 10^(-2) kg`

Answer» Correct Answer - B
The rataction of ethanol with water is as follows.
`2C_(2)H_(5)OH (l) + 2Na(s) rarr 2C_(2)H_(5)overline(O) Na^(+) +H_(2)(g) uarr`
2 moles of Na(46 g) = 1 mole of `H_(2)`
`= 2g = 2 xx 10^(-3) kg`


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