Extraction of metals questions | form three Chemistry

Thw most abudant metal in the earth’s crust is

1. Iron
2. Aluminium
3. Calcium
4. Sodium

With the aid of balanced chemical equations wherever appropriate, briefly outline the extraction of Zinc from zinc blende.

Give three (3) main uses of zinc.

The function of limestone in the extraction of iron in the blast furnace is to

1. reduce iron oxide
2. precipitate earth materials to slag
3. remove carbon monoxide
4. separate molten iron from impurities
5. lower the temperature of the blast furnace

1. Why are metals used as

1. reducing agents?
2. conductors of electricity?

2. Give the name of the metals which fits the following descriptions

1. It must be kept under kerosene to protect it from water or air?
2. The metallic element in limestone.
3. Its green green coloured carbonate decomposes when heated to give a black oxide.
4. Its oxide is yellow when hot and white when cold.

Study carefully the figure below and then answer the questions which follows

1. Name the apparatus
2. What is the element obtained by using the apparatus in figure above
3. State what the letters A,B,C,D,E,F and G represent
4. Name the ore used in this process
5. Is the element in (b) a metal or non-metal?

1. The diagram below represents the process of extraction of aluminium metal from bauxite. Label parts A,B,C,D,E,F,G and H.

1. Briefly explain how aluminium is obtained from its oxide
2. Explain how aluminium chloride is formed
3. What will happen if aluminium chloride reacts with water?

2. With the help of a balanced chemical equation , explain why aluminium containers can be used to store concetrated nitric acid and not concetrated sulphuric acid.

The only metal which does not react with dilute hydrochloric acid is

1. Magnesium 
2. Aluminum
3. Copper
4. Zinc
5. Sodium.

Explain six measures for minimizing the environmental degradation caused by extraction of metals in tanzania.