Notes and Study material for Exams
Non Metals As far as Elements are concerned, a nonmetal is simply an element that does not display the properties of a Metal. It is not defined by what it is, but by what it is not. It doesn’t look metallic, can’t be drawn into a wire or pounded into shape or bent, doesn’t conduct … Read more
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 … Read more
Polar stratospheric clouds (PSCs) Chlorofluorocarbons (CFCs) Ozone layer Ozone depletion Montreal Protocol Polar stratospheric clouds (PSCs) are clouds that form in the stratosphere, the layer of Earth’s atmosphere above the troposphere. PSCs are made up of ice crystals and other particles. They are important because they can help to catalyze the reactions that destroy ozone. … Read more