Answer: (a) The answer is (B) Magnesium because magnesium can easily react with oxygen to undergo oxidation reaction forming magnesium oxide (b) The answer is (B) Magnesium oxide. Magnesium...

  Answer: (a) Carbonate, calcination (b) Roasting (c) Sulfides

Aluminum, the most prevalent metal in the earth's crust, belongs to Period 3, Group IIIA of the periodic table (13)

  Answer: (a) The processes involved in:        (i) Dressing of ores are: Hydraulic washing Magnetic separation Froth floatation Chemical method/Leaching      (ii)  Refining of ores are:...

  (a) The chemical names and formulae of main ores have been mentioned below: (b) Aluminum oxide makes up to 60% of the bauxite ore. Ferric oxide, sand, and titanium oxide are the other...

  The significance of bauxite and sodium hydroxide in the extraction of aluminium had been mentioned below:

(a) Cryolite (b) Graphite Name of the substanceImportance in aluminium extraction(a) Cryolite It is utilized to lower fusion temperatures while also increasing conductivity.(b) Graphite Thick...

An alloy is a homogenous mixture of two or more metals or one or more metals with a few non-metallic elements Qualities of alloy differ from those of its constituents. Gold, for example, is far too...

An amalgam is a mixture or alloy of mercury with a variety of metals or a mixture of silver, gold, zinc, sodium, and non-metals. An example of amalgam is a dental amalgam made up of mercury and a...

  Answer: (a) The answer is (B) Magnesium. (b) The answer is (A) Zinc oxide

It is the process of heating concentrated ores like carbonate or hydrated oxide to a high temperature in the absence of air. The mineral must be too hard to melt at this temperature. Example - Metal...

Roasting is a technique that involves heating concentrated ore to a high temperature in the presence of air. Zinc blende (ZnS) is an ore that undergoes roasting to produce its oxide, zinc oxide. The...

The froth flotation method was employed to concentrate this ore. This technique is based on the gangue particles' preference for water wettability over the ore's preference for pine oil wettability.

  Answer: (a) Zinc blende is a type of zinc ore. Zinc sulfide is its chemical name, and its formula is ZnS. (b) The method used to concentrate it is the froth flotation method. (c) By heating...

When hydrogen gas is passed over heated copper oxide (CuO), a black coating present on the surface give reddish-brown colour due to reverse reaction. Consequently, Copper is produced. The redox...

Because iron and zinc are very reactive, they do not exist in their free states in nature. Their metal compounds — sulfides, oxides, and carbonates – are found in nature.

  Answer: (a) Calcination and roasting are two processes for converting concentrated ore into metallic oxides. Because oxides are easier to reduce to metals, concentrated ores are transformed...

The magnetic characteristics of metal particles and gauge particles are used in this procedure. On the roller belt, which is a magnetic belt, powdered ore is inserted. As a result, the magnetic...

(a) Hydrolytic method - The fundamental criterion is the difference in ore and gangue densities. We pour the ore over a sloping, vibrating corrugated table with grooves in this approach. Water is...

Haematite ore is used to extract iron from it. Iron is extracted from iron ore in a huge container called a blast furnace. Haematite contains iron (III) oxide, Fe2O3. The oxygen must be removed from...

  Answer: The metals that can be extracted from each one of the following ores are as follows: (a) Bauxite – Aluminum (b) Calamine – Zinc

Metallurgy is the branch of science concerned with extracting metals in their purest form from the ores that exist in nature.

(a) Ore - These are the minerals from which metals are commercially mined at a low cost and with minimal effort. (b) Gangue - The earthy impurities that are frequently combined with metal minerals...

Because gold is less reactive, ornaments made of gold appear new even after several years of use. This may be seen in the reactivity series, where it is positioned at the bottom. As a result, when...

  Answer: (a) Halogens are the elements in Group 17 of the periodic table. Their electronic configuration is ns2 np5. (b) Aluminum is a member of the Boron family. It belongs to the 13th group...

  Answer: The position of the following in the periodic table are: (a) Alkali metals: These are elements in the periodic table that belong to Group I. They are known for forming strong alkalis...

The metals listed below are a component of the following: (a) Blood pigment – iron is a component of hemoglobin (b) Plant pigment – magnesium is found in chlorophyll