extracting metals from their ores

extracting metals from their ores

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what is the meaning of extract ?

Multiple Choice

What is an ore?

• a solid metal

• a rock cantaining a metal combined with other elements

• an element

• an object used to row a boat

Open Ended

name some valuable metals we need to extract them

facts

Multiple Choice

the metals in the top reactivity series is ----------- metals in the bottom of reactivity series

• stronger than

• weaker than

Multiple Choice

the higher the metal in the reactivity series ---------its atoms joined with atoms of other elements in the compound

• the stronger

• the weaker

Multiple Choice

the more strongly the atoms of a compound are joined ------------it is extract an element from the compound

• the more difficult

• the less difficult

extracting gold

Multiple Choice

gold is

• highly reactive

• less reactive

• unreactive in normal condition

Multiple Choice

gold mainly found in nature as

• element

• compound

Multiple Choice

What is salad?

• element
• compound
• mixture

Multiple Choice

Contains only one kind of atom.

• Element

• Compund

• Mixture

gold is found in stream beds as a mixture with sand and gravels

Poll

gold is ...........dense than sand

• more

• less

Multiple Choice

it is .....................to separate gold from its mixtures

• easy

• hard

extracting metals in the middle of the reactivity series

Open Ended

name some valuable elements in the middle of reactivity series

extracting iron

Multiple Choice

iron has

• high reactivity

• less reactivity

• no reactivity

Multiple Choice

iron is found as

• elements

• compound

Multiple Choice

it is .......... to separate iron from its compounds

• easy

• hard

Multiple Choice

to separate iron from its compound we need ...........

• chemical change

• physical change

most iron is found as iron oxides in the earth crust

we extract iron from its oxide by a displacement reaction

Multiple Choice

A displacement reaction will occur when...

• a more reactive metal displaces a less reactive metal from its compound.

• A less reactive metal displaces a more reactive metal from its compound

• Displacement only occurs when two of the same metals are reacted

• Displacement reactions will only occur in metals above iron in the reactivity series

Multiple Choice

to displace iron from its compound we will add

• less reactive element than iron

• more reactive elements than iron

Multiple Select

why carbon use to displace iron in iron compounds

• carbon less reactive than iron

• carbon more reactive than iron

• carbon is cheap and there is plenty of it

extracting lead

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global citizenship

what is the usage of lead ?

Multiple Choice

lead is

• highly reactive

• less reactive

• unreactive

Multiple Choice

lead is found as

• compound

• element

Multiple Choice

we use ...... reaction to extract lead

• combustion reaction

• displacement reaction

Multiple Select

................... can replace Lead in its compound

• K

• C

• Ag

• Fe

extracting metals in the top of the reactivity series

Multiple Choice

Aluminum is

• highly reactive

• less reactive

• unreactive

Multiple Choice

Aluminum is found in nature as

• element

• compound

extracting Aluminium

Aluminium is found as Aluminium oxide (bauxite ) in the earth crust

Multiple Choice

the attraction force between Aluminum atoms and Oxygen Atoms in Aluminum Oxide is

• zero

• strong

• weak

Multiple Choice

carbon can displace Aluminum in its compound

• true

• false

Aluminum extracted from its oxide by electrolysis

watch

https://youtu.be/6P90li2PHfA

sodium extracted from the seawater by electrolysis