Category: science

what is valency ? how to calculate it?

Valency :- “It is the combining capacity of an atom”. it also indicates the number of electrons that can be gained , lost or shared . It decides that how many bonds can be formed, it gives the idea of molecule formation and the type of bond formed. calculation of valency is a simple task

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Full explanation of mole concept.

The word mole means pile up . This concept originated from a simple problem that was faced by the scientists to calculate the reactions. they needed a concept that could relate number of molecules with the weight. A mole of a substance is equal to as many molecules of that substance as there are number

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A Short intro to acid, base and indicators.

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?

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Electricity

                              Introduction 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 ,

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How to revise Digestive system in an easy way?

Human digestive system includes two basic things Alimentary canal 2. Digestive glands 1 Alimentary canal : human alimentary canal is basically a pipe of varying diameter which is designed for the maximum absorption of food. human alimentary canal is complete that is it two different openings for the ingestion of food and excretion of waste

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Why Alkynes are less reactive than alkenes and alkanes towards electrophilic addition reaction ?

There are two reasons for less reactivity of Alkynes towards electrophillic addition reactions:- Due to greater electronegativity of sp-hybridized carbon atoms of a triple bond than sp2 -hybridized carbon atoms of a double bond, pie-electrons of alkynes are more tightly held by the carbon atoms than pie electrons of alkenes and hence are less easily

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