Complete the word equation below:

Acid + alkali --> ............... + water

• water

• salt

• gold

• metal

Tags

NGSS.MS-PS1-2

.............................. + sodium hydroxide --> sodium chloride + water

• Nitric acid

• Sulphuric acid

• Hydrochloric acid

• Ethanoic acid

Tags

NGSS.MS-PS1-2

Why is toothpaste alkaline?

• It can neutralise strong alkaline in

  your mouth

• It can neutralise acid in

  your mouth

• It can refresh your teeth

• Toothpaste is not alkaline.

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

What colour is Universal indicator when the solution is neutral?

• Red

• Green

• Blue

• Purple

What type of reaction occurs when you react an acid with an alkali?

• combustion

• decomposition

• no reaction

• neutralisation

Tags

NGSS.MS-PS1-2

Sulphuric acid + potassium hydroxide --> ........................ + water

• potassium sulphate

• potassium sulphurate

• potassium nitrate

• magnesium hydroxide

Lithium hydroxide + nitric acid ->

• Lithium nitrate + hydrogen

• Lithium nitride + salt

• Lithium nitrate + water

• Lithium nitrate + hydroxide

ph range of acids are .....

• 0-6

• 7

• 8-14

• 4-10

ph range of alkalis are .....

• 0-6

• 7

• 8-14

• 4-10