Acids and alkalis elementary

The opposite of an acid is an ...

• neutral

• indicator

• alkali

• neutralisation

The opposite of an alkali is an ...

• neutral

• indicator

• acid

• neutralisation

If something is not an acid or an alkali it is ...

• neutral

• indicator

• acid

• neutralisation

An acid turns litmus paper...

• blue.

• green.

• yellow.

• red.

An alkali turns litmus paper...

• blue.

• green.

• yellow.

• red.

An acid has a pH between ....

• 1 and 6

• 7 and 7

• 8 and 14

• 1 and 14.

An alkali has a pH between ....

• 1 and 6

• 7 and 7

• 8 and 14

• 1 and 14.

A neutral substance has a pH between...

• 1 and 6

• 7 and 7

• 8 and 14

• 1 and 14.

To measure pH we can use an ...

• watch.

• thermometer.

• indicator.

• ruler.

When an acid becomes pH 7 this is called ...

• neutralisation.

• naturalisation.

• nuclearisation.

• nastilisation.