Acids Bases and Salts

The correct way of making a solution of acid in water is to?

• a) add water to acid

• b) add acid to water

• (c) mix acid and water simultaneously

• (d) add water to acid in a shallow container

Products of a neutralisation reaction are always:

• (a) an acid and a base

• (b) an acid and a salt

• (c) a salt and water

• (d) a salt and a base

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:

• (a) red and blue

• (b) blue and red

• (c) pink and colourless

• (d) colourless and pink

When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

• (a) Organic matter

• (b) Quick lime

• (c) Slaked lime

• (d) Calamine solution

Which of the following set of substances contain acids?

• (a) Grapes, lime water

• (b) Vinegar, soap

• (c) Curd, milk of magnesia

• (d) Curd, vinegar

When an ant bites, it injects

• (a) acidic liquid

• (b) basic liquid

• (c) both (a) and (b)

• (d) neutral liquids

Our stomach contains?

• (a) hydrochloric acid

• (b) sodium hydroxide

• (c) sulphuric acid

• (d) nitric acid

When a drop of vinegar solution is put on the blue litmus paper, it turns

• (a) red

• (b) blue

• (c) green

• (d) yellow

When we suffer from acidity, we should take

• (a) iron tonic

• (b) vitamins

• (c) antacid

• (d) lactocalamine

Neutralisation reaction is a

• (a) physical and reversible change

• (b) physical and irreversible change

• (c) chemical and reversible change

• (d) chemical and irreversible change