A colourless solution is tested by the following reactions. Which reaction is not characteristic of an acid?
A
A piece of magnesium ribbon is added. Bubbles are seen and the magnesium disappears.
B A pungent smelling gas is produced when ammonium carbonate is added.
C Copper oxide powder is added and the mixed is warmed. The solution turns blue.
D
The solution turns blue litmus red.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.