Y7 acids and alkalis chemistry

What is the pH of a strong acid?

• 1

• 3

• 6

• 14

What is the colour an alkali turn when universal indicator is added?

• Red

• Blue

• Green

• Yellow

When an acid and an alkali are mixed it can cause what type of reaction?

• Combustion

• Rusting

• Neutralisation

• Condensation

A farmer find out his potatoes grow best in soils of pH 7 but when he tests his soil it is pH 4. Using ideas of neutralisation what can he do to improve the amount of potatoes he can grow?

• Add a acid to the soil

• Add an alkali to the soil

• Add a pesticide to the potatoes

• Plant the potatoes next year when the soil is ready

Which is the most accurate way of finding the pH of a solution out?

• Litmus paper

• Universal indicator

• Home made indicator e.g cabbage

• pH Probe

When the hydrochloric acid and sodium hydroxide are mixed what salt is formed?

• sodium chloride

• Sodium acid

• Sodium hydrochloride

• Chloride oxide

When the sulphuric acid and Lithium hydroxide are mixed what salt is formed?

• Sulphate hydroxide

• Lithium sulphate

• Acid hydroxide

• Hydroxo sulphate

When the nitric acid and potassium hydroxide are mixed what salt is formed?

• Nitrate acid

• hydroxo nitrate

• Potassium nitric

• Potassium Nitrate

The process of separating an insoluble particle from a solution is known as?

• Neutralisation

• Filtration

• Freezing

• Distillation

If you see a symbol of a skull and crossbones on a chemical what does this indicate?

• The chemical will burn if it gets on your skin

• The chemical is toxic if put on your skin

• The chemical is corrosive if it gets in your eyes

• The chemical is toxic if swallowed