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General Knowledge for Competitive Exams

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Green Crackers: Meaning, Composition and Facts

Oct 21, 2019
Firecrackers are enjoyed by most of the children in the Diwali festival. And every time it is seen that due to crackers air pollution increases and affects health. CSIR came up with the solution and developed green crackers which are better than previous sound-emitting crackers and other fireworks. Let us read more about green crackers, how they will help in combating air pollution, composition of green crackers, etc.

Indian Railways eco-friendly initiative: All you need to know

Aug 23, 2019
Do you know that Indian Railways is going to take an eco-friendly initiative and that is to ban single-use plastic materials on Railway premises including trains from 2nd October? Let us read more about this.

What is Chemical Explosive and its typology?

Feb 15, 2019
The use of chemical and explosive materials by criminals and terrorist groups poses a significant threat not only to the public safety on a large-scale but also severely impact economic and political stability in the contemporary world. Explosives are those substance which provides extreme heat and energy and a sharp cracking sound on combustion. They usually have less potential energy than fuels, but their high rate of energy produces a great blast pressure.For a chemical to be an explosive, it must exhibit all of the following: Rapid expansion (i.e., rapid production of gases or rapid heating of surroundings);evolution of heat;rapidity of reaction; and initiation of reaction.

General Science A Complete Study Material

Jan 2, 2019
Understanding the basics of General Science can lead any aspirant to achieve good marks in the examination. Therefore, We have compiled a complete study material on General science with major subjects like Biology, Chemistry and Physics.

What are the impacts of Nitrogen Pollution?

Dec 24, 2018
Nitrogen constitutes 78% of Earth’s air. It is essential to exist life on earth but too much of everything is dangerous in the same way excess amount of nitrogen may be dangerous for soil, plants, living beings, etc. Let us study through this article about Nitrogen, its uses, nitrogen pollution, how it is caused, what are the impacts of nitrogen pollution etc.

Interesting facts about Cyanide

Dec 10, 2018
Cyanide is a chemical that can be present in different forms. This is known as the most dangerous poison. Let us study through this article about cyanide poisoning, its impact, symptoms, are all cyanides are dangerous or fatal etc.

What is “OneerTM”?

Nov 28, 2018
OneerTM is a technology which will be helpful in rural areas and is developed under Make in India Mission. But do you know for what purpose OneerTM is developed, what are its features, how it will work etc. Let us find out through this article.

Why Gold does not rust?

Oct 16, 2018
We know that gold has been used in India since ancient times. Its accuracy is measured in the carat. People use it in the form of jewellery, coins, etc. You may have noticed that gold does not rust like other metals but why? Let's study through this article.

Reasons behind the earthy odour of soil after first rain

Sep 6, 2018
Have you ever noticed that when first drops of rain fall on the dry land, the unique earthy odour comes out of the soil or surrounding environment? Why does this happen. Is there any scientific reason behind it? Let's study through this article.

Why do particles of matter constantly move?

Aug 20, 2018
Matter is that occupies space and has weight. Everything around us is made up of particles. The particles which make up matter are so small that we cannot see them with a high power microscope. One of the characteristic of particle is that it constantly moves. Let us prove it through this article.

What is the chemical composition of Sweat?

Jul 11, 2018
Sweat is the natural phenomenon of our body. It maintains the temperature of the body. It is also known as perspiration. Let us study the chemical composition of sweat through this article.

What is an Alkali and Alkaline solution?

May 29, 2018
Alkali is a basic hydroxide or ionic salt which is soluble in water. All bases are not alkali. They turn red litmus paper to blue having pH value greater than 7. Let us study through this article about alkali, its properties, uses and about alkaline solution.

The Concept and importance of pH Scale

May 29, 2018
S.P.L Sorenson, a Danish biochemist in 1909 devised a scale known as pH to represents the H+ ion concentration of an aqueous solution. The pH value of any solution is a number which simply represents the acidity and basicity of that solution. The pH value of any solution is numerically equal to the logarithm of the inverse of the hydrogen ion (H+) concentration. Hence, the pH of solution is referred to as the negative logarithm of hydrogen ion.

What is Washing Soda and how it is produced?

May 3, 2018
Washing soda is sodium carbonate with 10 molecules of water of crystallisation. It is used in the manufacture of glass, soaps, detergents, paper etc. Let us study through this article about washing soda, its production, properties and uses.

What is the difference between Polymer and Plastic?

Apr 24, 2018
Plastics are a group of substances that can be easily folded and can be moulded into any shape. On the other hand, the compound of high molecule weight, which is the result of the polymerization process, is called polymer. Let us study through this article in detail about polymers, plastics and the differences between them.

What are Chemical Weapons, types and impact

Mar 19, 2018
Use of Chemical Weapons began in World War I. Such weapons consists of various chemicals like chlorine, phosgene etc. Chemical weapons can be used in any form whether gas or liquid. Let's study through this article about chemical weapons, its impact on the body, types of chemical weapons etc.

What is the difference between Steel and Stainless Steel?

Feb 8, 2018
Steel and stainless steel are the common materials used in the country. There are differences between the two regarding properties, composition, weight, price, etc. This article deals with such differences between steel and stainless steel.

How Ionic Compounds are formed?

Jan 29, 2018
Ionic compounds are also known as electrovalent compounds. The chemical bond formed by the transfer of electrons from one atom to another is known as Ionic bond. These compounds contain ions. Through this article we will study about the ionic compounds, how they are formed with examples etc.

Global Warming: Effects and Causes

Jan 15, 2018
Global Warming is the increase in Earth's mean surface temperature because of the effect of greenhouse gases. These gases absorb long wave radiations and warm the atmosphere, and this process is called as Greenhouse effect. It had led to many changes on the planet, such as rise in sea level; massive melting of snow and land ice, elevated heat content of the oceans, increased humidity, change in the timings of seasonal events, and many others. The main greenhouse gases, namely:Carbon dioxide (CO2); Methane (CH4); Nitrous oxide (N2O); Hydrofluorocarbons (HFCs); Perfluorocarbons (PFCs); and Sulphur hexafluoride (SF6).

What is the difference between LED and CFL bulbs?

Jan 11, 2018
We all use LEDs or CFL bulbs. But do you know what is the difference between LED and CFL bulbs? Which bulb is better LED or CFL, in which power consumption is less, which material is used in making it and how it works, etc. Through this article we will try to study about these LED and CFL bulbs.

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