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CHEMISTRY IN SOCIETY: Fertilizers
ENVIRONMENTAL EDUCATION: Chemistry In Society - Extraction Of Metals
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Alkali metals and alkaline earth metals
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Identification Of Ions
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Salts
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Transition metals
MATTER - PROPERTIES AND TRANSFORMATION: Principles Of Chemistry - Formulae, Moles And Equations
MATTER: PROPERTIES AND TRANSFORMATION: Rates Of Reaction
MATTER: PROPERTIES AND TRANSFORMATION: Reversible Reactions
PRINCIPLES OF CHEMISTRY: Electrochemistry
PRINCIPLES OF CHEMISTRY: Gaseous State

5/58 MCQs for:

ENVIRONMENTAL EDUCATION: Chemistry In Society - Extraction Of Metals

In Cameroon, ALUCAM is located in:

Yaounde where there is a hydroelectric power station.

Edea where there is a hydroelectric power station.

Douala where there is a hydroelectric power station.

Kribi where there is a hydroelectric power station.

__ is the second most abundant element after aluminium.

Fe.

K.

Na.

Ca.

In the extraction iron from haematite, the limestone also plays a second function due to the fact that:

It preserves the iron.

The carbon dioxide formed when it decomposes, replenishes that formed at the bottom of the furnace as coke reacts with oxygen.

It helps solidifies the iron.

None is correct.

The extraction of copper make use of:

2CuFeS_{2 (s)} + 4O_{2 (g)} → Cu₂ S_(s) + 2FeO_(s) + 3SO_{2 (g)}.

All are correct.

Cu₂S_(s) + O_{2 (g)} → 2Cu_(s) + SO_{2 (g)}.

Aluminium can be extracted from:

Cryolite (Na₃AlF₆).

Potash.

Bauxite (Al₂O₃.2H₂ O) and Cryolite (Na₃AlF₆).

Bauxite (Al₂O₃.2H₂ O).