Question

Indicate whether each statement is true or false. If you think the statement is false, rewrite it to make it true.

(9a). If a cloud of black smoke pours from the tailpipe of a running car, it is likely that the air/fuel mixture is too lean.

(b). Adding sodium oxide to water produces sodium hydroxide, an acid.

(c). If an oxide is introduced into water and the pH changes from 7 to 9, the oxide most likely contains a metallic element.

(d). The catalytic converters in newer-model cars are designed to convert nitrogen monoxide to nitric acid and oxygen.

(e). The difference between a neutralization reaction involving a hydroxide compound and a neutralization reaction involving a carbonate compound is the formation of water as a product.

Answer 1

9.

(a) True. If the air/fuel mixture is too lean the exhaust will give rotten egg smell and it will make black smoke.

(b) False. Adding sodium oxide to water produces sodium hydroxide which is a basic compound.

(c) True. Metal oxides react with water to form metal hydroxide which is basic in nature.

(d) False. It is designed to convert nitrogen monoxide to nitrogen gas and oxygen gas.

(e) True. Both reaction forms water as a product along with respective salts.