Who discovered Potassium?

• Humphry Davy

• Alan Turing

• Bill Gates

• Tim Berners-Lee

Magnesium oxide (MgO) + Water (H₂O)?

• [Mg(OH)]

• [Mg₂(OH)]

• [Mg(O₂H)₂]

• [Mg(OH)₂]

What is formed when Magnesium is burnt?

• Baking Soda

• Calcium Carbonate

• Ash

• Vinegar

The process of depositing a layer of zinc on iron is called ..............

• Galvanisation

• Crystallisation

• Rusting

• Baking

Blue Vitriol is another name for which of the following?

• Copper Sulphate

• Oxygen

• Copper

• Magnesium Oxide

The rubbing surface of a matchbox has powdered glass and a little red............

• antimony

• arsenic

• silicon

• phosphorus

147.

The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

• Vinegar

• Ash

• Baking Soda

• Copper

Crystallisation is an example of 

• Physical Change

• Chemical Change

• Chemical Reaction

• Galvanisation

Vinegar and Baking Soda together produce ..............

• Copper

• Carbon Dioxide

• Copper Sulphate

• Magnesium Oxide

What is formed when Carbon Dioxide is passed through Lime water?

• Copper Sulphate

• Calcium Carbonate

• Magnesium Oxide

• Baking Soda