chemistry sports hall

Which of these is a giant covalent structure?

• sodium choride

• diamond

• oxygen

• carbon dioxide

Which if these is an ionic compound?

• graphite

• magnesium chloride

• nitrogen

• sulfur dioxide

Acidity is a measure of the concentration of which ion?

• Na⁺

• Cl^-

• H⁺

• OH^-

A pH of 7 is

• acidic

• alkaline

• strongly acidic

• neutral

Universal indicator turns this colour in a strong acid

• green

• red

• yellow

• violet

A reaction between an acid and a base (alkali) is called

• Neutralisation

• oxidation

• decomposition

• displacement

When hydrochloric acid reacts with sodium hydroxide two products are formed

• a salt plus chlorine

• a salt plus sodium

• carbon dioxide plus water

• a salt plus water

If hydrochloric acid is reacted with sodium hydroxide the salt formed is called

• sodium hydro

• sodium chlorine

• sodium chloride

• water

When magnesium (group 2 ) forms an ion it is

• Mg⁺

• Mg ²⁺

• Mg ^-

• Mg^2-

When oxygen (group 6) forms an ion it is

• O²⁺

• O⁺

• O^2-

• O^-