chem r.s.

what is reactivity series ?

• series of element according to highest to lowest

• series of element according to their melting point from highest to lowest

• series of element according to name

• series of element according to their reactivity from longest to shortest

which metal is most reactive

• Potassium

• Gold

• Platinum

• Iron

What is displacement ?

• a chemical reaction of a soluble base that releases hydroxide ions

• a chemical compound that releases hydrogen ions when dissolved in water

• def not this

• chemical reaction where a more reactive displaces a less reactive element

choose the least reactive metal

• Calcium

• Silver

• Copper

• Zinc

Calcium use Heat with Carbon as extraction method ? type true or false

extraction method for Aluminium

• heat with carbon

• blast furnace

• electrolysis

• none of above

extraction method that Silver uses is ?

• Electrolysis

• Heat with carbon

• Blast Furnace

• Heat alone

what metal does not react with oxygen ?

• Gold

• Iron

• Magnesium

• Calcium

Magnesium react quickly in cold water. true or false ?

Which gas is produced when magnesium reacts with hydrochloric acid?