Green chemistry, also called sustainable chemistry, is most popular branch of science today especially with regards to synthetic chemistry. It brings the concept to design of products and processes in such a way that minimizes the use and production of hazardous substances/chemicals.

हमारे रोजमर्रा के जीवन में हम अनेक बार वर्गीकरण यानी क्लासिफिकेषन की आवष्यकता महसूस करते हैं चाहे दवा की दुकान हो या लाइब्रेरी। सुविधा के अनुसार वस्तुओं को क्रमबद्ध रखने की कला हमारे लिए मददगार साबित हो सकती है।

Acidic and basic are two extremes that describe a chemical property of substances. Mixing acids and bases can cancel out or neutralize their extreme effects. A substance that is neither acidic nor basic is neutral.

A fire extinguisher is device used to extinguish or control small fires in emergency situations. It is not intended to be used in a situation when the fire is out-of-control.

As the summer starts every body starts talking about the rising level of mercury. Whenever someone gets angered, then also we say that his / her mercury level is going up. In fact mercury is a metal, which is very widely used to measure the degree of hotness or coldness of a body.