Some important chemcial compounds – properties and uses.
Compounds are defined as substances composed of two or more different elements that are chemically combined. Both salt and water are compounds. Some important chemical compound and their uses are as follows:- NaCl sodium chloride (table salt, used in solutions for contact lens) ZnO zinc oxide (used in some sunscreens and diaper rash ointment) NaF sodium fluoride (active ingredient in toothpaste) SeS selenium sulfide (in selsium blue shampoo) NaNO2 sodium nitrite (preservation in meat such as bacon) NaClO sodium hypochlorite (bleach) N2O dinitrogen oxide (laughing gas used for some dental work) Baking powder NaHCO3; sodium bicarbonate Used for baking for ... Read more
03.04.18 (CGPCS) Chhattisgarh Current Affairs
CHHATTISGARH CM assures power supply to every household by June-July Promising for 100 percent electrify the last village of Chhattisgarh by June-July, Chhattisgarh chief minister Raman Singh on the last day of 20-day long Loksuraj Abhiyan said that this Vidhan Sabha election, he targets for first division marks by securing 65 seats unlike past three polls. Chief minister Raman Singh said that three-phased Loksuraj Abhiyan that began from January, came to an end on March 31 was like ground reporting for him where he gets first hand information from citizens about their need, complaints and expectations. While many of the issues were resolved on the spot ... 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 from escaping into space, instead reflecting the energy back to further warm the surface. Human activities that produce GHGs (anthropogenic) amplify the greenhouse effect. Anthropogenic GHG emissions are modifying the Earth’s energy balance between incoming solar radiation and the heat released back into space, resulting in climate change. Gases such as CO2 , NO2 , CFCs (chloro fluorocarbons) allow sun ... Read more
The pH of natural rain is found to be in the range from 5 to 7. The term acid rain is customarily applied to precipitation with a pH below 5. Such low pH values are generally possible only in the presence of large amounts of anthropogenic pollution. Sulphuric acid and nitric acid is considered as the principal agents responsible for acid rain. But the major culprit are human beings. Smokes emitted from the industries is the major source of sulphur dioxide whereas smokes emitted from the motor vehicle is the major source of nitrogen oxide. These emissions mixed with atmospheric ... 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 natural quality of any component of the environment. Classifications 1. According to the form in which they persist after release into the environment. • Primary pollutants: These persist in the form in which they are added to the environment e.g. DDT, plastic. • Secondary Pollutants: These are formed by interaction among the primary pollutants. For example, peroxyacetyl nitrate (PAN) is ... Read more