NPK fertilizer is a complex inorganic fertilizer which consists of Nitrogen (N), Phosphorus (P) and Potassium (K). These three primary nutrients of the NPK fertilizers is required for healthy plant growth of .....

Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration and other high temperature treatment method is also known as "thermal treatment" .....

Land fill dumping is the disposal of waste materials by burying them between the layers of .....

Solid wastes include trash and garbages that are sold in nature. Solid waste management is the entire process of collecting and disposing these types of solid wastes from houses as well as .....

Biodegradable waste is defined as a type of waste, typically originating from plant or animal sources, which may be degraded by other living .....

Insecticides are defined as the chemical substances, which are used to kill harmful  insects (like: insects that destroy crops and eat fruits). If not used properly, insecticide degrade the crops as well as the fertility of the soil and .....

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Synthetic cleansers are the substances which are chemically prepared and are used for cleaning purpose (especially cleaning skin). They are typically used to remove make-up, dead skin cells, oil, dirt, and other types of pollutants from the skin .....

The waste produced by the industries process or acitivity are called industrial .....

Chemical pollution is defined as the presence or increase in our environment of chemical pollutants that are not naturally present there or are found in amounts higher than their natural background values. Most of the chemicals that .....

Fertilizer  are chemical or natural substance added to soil or land to increase it .....

Soapless soap is a common name given to "Detergents". Traditionally soaps are Sodium or potassium salts of fatty acids, however detergents are nor salts but are simply surface active chemicals showing soap like properties. Hence they are .....

A water-soluble cleansing agent which combines with impurities and dirt to make them more soluble, and differs from soap in not forming a scum with the salts in hard .....

 Saponification is a process where, an alkali is used to cause changes in animal or vegetable fats, leaving behind soap and .....

A soap is a substance used with water for washing and cleaning, made of a compound of natural oils or fats with sodium hydroxide or another strong alkali, and typically having perfume and colouring .....

Plastic is defined as an artificial material made by the polymerization of carbon containing monomers (i.e. synthetic polymer). It can be designed in any shape by applying heat or .....

Concrete is defined as a  mixture of cement, gravel, coarse, sand and water, which is used for roofing and .....

Some articles made by ceramics are coated with tin oxide or lead oxide and heated again. The coating forms a thin layer over the surface. This process is termed as glazing. Glazing makes the surface of ceramics smooth, attractive and .....

Kaolin is defined as the pure fine white clay made of feldspar. It is used in .....

Ceramics is defined as a special type of clay containing compounds of silica, nitrogen and oxygen. It is the clay made up of clay, feldspar, silicates. It is used for making household pottery, jugs, tiles, bowls, cups, sinks .....

Silica glass is defined as the glass which is prepared by heating pure silica at 1600oC. It is also called as quartz glass. It is a pure crystalline .....

Flute glass is defined as the glass that has a stem and in which wine is .....

Lead cryatal glass is defined as the glass which is obtained after heating the mixture of potassium carbonate, lead monoxide and silica at high .....

Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents.  Borosilicate glasses are known for having very low coefficients of thermal expansion making them resistant .....

Annealing is process where a metal or glass is heated and allow it to cool slowly, in order to remove internal stresses and toughen .....

The ordinary glass is defined as the glass which is obtained after heating the mixture of sodium carbonate, calcium carbonate and silica athigh temperature about 1500oC. It is prepared by heating the mixture of 50% silica, 25% piece of glass, 15% .....

Water glass is a solution of sodium or potassium silicate which solidifies on exposure to air, used for preserving eggs and hardening artificial .....

Gold lies in group 11, period 6 and block .....

Any two metals used in making coins are gold and .....

Gold and silver are the metal mostly used in .....

A metal made by combining two or more metallic elements, especially to give greater strength or resistance to corrosion. Examples of alloys include stainless steel, brass, bronze, white gold, 14k .....

The electronic configuration of the metal Gold on the basis of sub-shell is  1s2  2s22p6  3s23p6  3d104s24p6  4d105s25p6  .....

The electronic configuration of the metal silver on the basis of sub-shell is 1s2  2s22p6  3s23p6  .....

The electronic configuration of the metal copper on the basis of sub-shell .....

The electronic configuration of the metal aluminium on the basis of sub-shell .....

The electronic configuration of the metal iron on the basis of sub-shell .....

Aurous and auric are basically the ions derived from the gold atom. Aurus ion is formed when a gold atom loses an electron and is denoted by Au+. Its valency is .....

Argentite, which is a sulphide ore, is the main source of .....

The major ore of copper .....

The major ore of aluminium is .....

Haematite and magnetite are the major ore of .....

Can you compare these two figure. So the block will be d- block. Now try with other element to understand more. If you have any problem, feel free to ask .....

Aluminium(Al) belong to Group 13, Period 3, Block p in the periodic .....

Fe+2 is ferrous ion and Fe+3 is ferric ion . These are different forms of iron as an cation. Every metal has a tendency to lose electrons very easily.Iron being a metal also does the same . Remember: Ferric is always used for iron having .....

An amalgam is an alloy of mercury with another metal. Almost all metals can form amalgams with mercury, the notable exceptions being iron, platinum, tungsten, and tantalum.  Silver-mercury amalgams are important in dentistry, .....

Ductility is a physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking. A ductile substance can be drawn into a wire. For example : .....

A substance that is malleable is soft and can easily be made into different shapes.  For example: Silver is the most malleable of all .....

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First we have to find square root of 1250.         That means,   √(1250) = 35.355 Now, find square of 35.     That means , 352 = 35 x 35= 1225. Since 1225 is the nearest  square less than .....