Acid Properties

The pH scale is a range from:

• 1-7

• 1-14

• 0-14

• 1-20

Acid changes the colour of a ................. litmus paper to ........

• red.....blue

• red....purple

• blue...red

• blue...colourless

Acid and alkalis show their properties only in the presence of (a)  

Blue litmus is dipped into solution X in a beaker. Blue litmus paper turns red. This shows that solution X is

• Acidic

• Alkaline

Tags

NGSS.MS-PS1-2

Blue litmus paper turns red in acidic substances.

• True

• False

Substance with pH value 1-3 is a

• Strong acid

• Weak acid

• Strong alkali

• Weak alkali

pH 1-6 belongs to

• Acid

• Alkali

Which of the followings is a subtance with pH 2

• Soap

• Vinegar

• Detergent

A reagent bottle contains acid and alkali must be labelled with this symbol. It is because...

• Acid and alkali is irritant

• Acid and alkali is corrosive

• Acid and alkali is flammable

• Acid and alkali is poisonous

Diagram shows an effect on filter paper after a few drops of concentrated hydrochloric acid drop on it.

Inference for this experiment is ...

• Hydrochloric acid is corrosive

• Hydrochloric acid is flammable

• Hydrochloric acid is hot

Tags

NGSS.MS-PS1-2