Which of the following substances in water will not show acidic properties ?
Sugar, alcohol, acetic acid, urea, nitric acid and carbon dioxide

Explanation

Substances which give off `H^(+)` ions in solution show acidic properties.
Out of the substances given,sugar,alcohol and urea do not produce `H^+` ions in solution. Hence, they will not show acidic properties.
Carbon dioxide in water give carbonic acid which is dissociated as
`CO_(2) + H_(2)O rarr H_(2)CO_(3) rarr 2H^(+) + CO_(3)^(2-)`
Hence, it shows acidic properties.