ABS (NA)

Which gas is given off when acids react with a carbonate?

• oxygen

• hydrogen

• ammonia

• carbon dioxide

Which of the following substance is a salt?

• hydrochloric acid

• magnesium oxide

• sodium nitrate

• zinc hydroxide

Which salt is formed when nitric acid reacts with magnesium oxide?

• magnesium chloride

• magnesium sulfate

• magnesium nitrate

• magnesium iodide

Which of the following properties is not true of a base?

• It has a bitter taste.

• It reacts with ammonium chloride to produce ammonia gas

• It turns blue litmus paper red.

• It reacts with an acid to produce water and a salt

The table provides information about pH value of four liquids.

Which two liquids are alkaline?

• P and Q

• Q and R

• R and S

• S and P

The chart shows the positions of four substances on the pH scale. Which substance will turn Universal Indicator blue?

• A

• B

• C

• D

An element X reacts with oxygen to form an oxide which dissolves in water. The solution turns Universal Indicator red.

What are X and its oxide?

• a metal; acidic

• a non-metal; acidic

• a metal; basic

• a non-metal; basic

A student carries out an experiment to prepare pure magnesium sulfate crystals.

The diagram shows the first stage.

He adds magnesium carbonate until no more reacts.

Which process should he use for the next stage?

• crystallisation

• evaporation

• filtration

• neutralisation

The diagram shows the label on a box of indigestion tablets. The tablets react with hydrochloric acid in the stomach.

Which gas is formed in the stomach when one of the tablets is swallowed?

• ammonia

• carbon dioxide

• hydrogen

• oxygen

Which substance reacts with dilute hydrochloric acid to form hydrogen?

• zinc carbonate

• zinc hydroxide

• zinc metal

• zinc oxide