Question 1
Choose the INCORRECT statement about magnesium.
◦ Magnesium is valued for its light weight.
◦ It has a lower density than any other structural metal.
◦ Aircraft parts are made from magnesium alloys.
◦ It is a good oxidizing agent.
◦ It is often used as a sacrificial anode.
Question 2
Choose the INCORRECT statement about Na
2CO
3.
◦ A by-product from the production of Na
2CO
3 is CaCl
2, which has a useful application in some localities.
◦ It is an important commercial compound used in the glass, soap and paper industries.
◦ It is produced by the Solvay process which utilizes NaCl and CaO as the primary raw materials in a multi-step synthesis.
◦ It is mined from large deposits in the western United States.
◦ Sodium carbonate can be formed by heating sodium bicarbonate.