Tag - upsc

இன்பத் தமிழ்-எழுத்துக்களின் பிறப்பு – அறிமுகம்

இன்பத் தமிழ் எழுத்துக்களின் பிறப்பு – அறிமுகம் அ, உ, க, ப -ஆகிய எழுத்துகளை ஒலித்துப் பாருங்கள். வாயைத் திறந்து ஒலித்தாலே. அ என்னும் எழுத்து ஒலிக்கிறது. உ என்னும்...

Organic compounds-I

Organic compound The compounds of mainly carbon and hydrogen or compounds of carbon and hydrogen with other elements like phosphorous, oxygen, nitrogen, sulphur...

P-h scale

PH scale-strength of acids and bases Measurement of strength of acid and base solution Acidic and basic solution Water on ionization gives H+ and OH- ionsIn pure water...

The sun and The planets

THE SUN The sun accounts for more than 99 per cent of the mass of the solar system and due to this the sun exerts immense gravitational pull to keep the planets rotating...

INDIAN ECONOMY

The most appropriate method to measure the economic growth of the country gross domestic product (GDP)India is recorded as a country of demographic dividend due to high...

Classification of elements

Classification of elements Evolution of periodic table After the discovery of large numbers of elements and their compounds, the study of these elements and compounds...

METALS AND THEIR COMPOUNDS

The metals occur in free state are gold platinum and silver the purity of gold is measure by the unit carat the metal used in fire work to make brilliant white light...

THE UNIVERSE/PART-II

GALAXY A large group of stars is called a galaxyThere are billions of galaxies of different sized regular and irregular shapeGalaxies can be divided into two...