From esters :-
Acid base and salts Acids:- these are the substances that Are sour in taste. Turn blue litmus red. Give H+ ions. Can accept a pair of electrons. Base :- These are the substances that Are bitter in taste. Turn red litmus blue. Soapy in touch. Give OH– ions. How to recognise the acid and bases?
THE INDICATORS These are the substances that change their properties , colour or smell when react with an acid or base. OLFACTORY INDICATORS These indicators change their smell when they react with an acid or a base. For example :- clove oil, vanilla essence and the smell of onion juice. The cloth dipped with onion
ELECTRICITY This term came from the Greek word ELEKTRON which means Amber. So the story begins from the year 600BC, Thales Of Miletus(a Greek philosopher) observed the attraction of amber towards fiber and other small particles when rubbed vigorously. Later around 1600 AD. William Gilbert also found that other substances besides amber , could also
Units of electric charge The S.I. unit of charge is Coulomb represented by ‘C’. And this is the amount of charge that is contained by 6 X 1018 electrons Charge on 1 electron = -1.6 X 10-19 C Charge on 1 proton = +1.6 X 10-19 C Electric current To understand this concept in an
Whenever we talk about the cruel leaders of the world, the name of Hitler strikes at the first in our mind. He was another face of hate in mid 19th century. He believed that Aryans are born to rule the while earth. This sense of superiority lead him to be the reason of death of
In case of haloarenes the halogen atom attached to the Bezene ring has a double bond like character. The following reasons favour the less reactivity of aryl halides.
In case of SF6 the hybridisation is sp3d2 and the structure is octahedral . In the view this structure the four Florine atoms are in equatorial position and two are in the axial position. and thus there are maximum of five atoms present in a single plane .