21.02.18 (CGPCS) Chhattisgarh Current Affairs

CHHATTISGARH C’garh second highest after kerala in male-female sex ratio   A NITI Aayog report issued recently has pointed out that Chhattisgarh holds second rank after Kerala in terms of male-female sex-ratio (at the time of birth), Health Department officials Read More …

Respiratory system of human being and mechanism of respiration

Respiratory System Introduction Red blood cells are like trucks that transport cargo on a highway system. Their cargo is oxygen, and the highways are blood vessels. Where do red blood cells pick up their cargo of oxygen? The answer is Read More …

Preparation of Oxygen

Preparation of Oxygen Oxygen is prepared in lab generally in two ways either by the application of heat or no application of heat. Using heat: Oxygen in lab is prepared by heating the mixture of powdered potassium chlorate and manganese Read More …

Preparation of nitrogen

  Preparation of nitrogen Nitrogen is found in both free and combined states. It occupies 78.07% by volume. Nitrogen can be prepared: By heating copper in air: Firstly, air is passed through lime water and then concentrated sulphuric acid to Read More …

laboratory method of preparing alcohol

Laboratory method of preparing alcohol Hydrolysis of Alkyl Halides This is a nucleophilic  substitution reaction. R-X + KOHaq → R-OH The method is not satisfactory as olefins are also formed as by-products. However better yields is obtained by using moist Ag2O or Read More …

Concept of Ecosystem, Structure and Function of Ecosystem

Eco-System-An ecosystem is defined as a structural and functional unit of biosphere consisting of community of living beings and the physical environment, both interacting and exchanging materials between them. It includes plants, trees, animals, fish, birds, micro-organisms, water, soil, and  Read More …

Global Environmental Issues like Green House Effect, Green House Gases and their mitigation.

The Greenhouse Effect The greenhouse effect is a natural phenomenon that insulates the Earth . Incoming solar radiations are absorbed and reemitted back from the Earth’s surface as infrared energy, greenhouse gases (GHGs) in the atmosphere prevent some of this heat Read More …

Types of pollution and their management; air, water, soil, sound/noise, radioactive and e-waste. Industrial waste and its management. Impact of Solid Waste Management, recycling and reuse,

ENVIRONMENT POLLUTION defined as ‘an addition or excessive addition of certain materials to the physical environment (water, air and lands), making it less fit or unfit for life’. Pollutants are the materials or factors, which cause adverse effect on the Read More …