How the age of mummies , dead bodies and fossils is calculated?
The aging of different organisms is mainly calculated by the special technique called the Radiocarbon dating. In this technique the age of any specimen is calculated on the basis of […]
Why does copper turns green on exposure to air ?
This happens because of corrosion of copper , as the copper is exposed to air it reacts slowly with water from the moisture present in air, carbondioxide and oxygen. And […]
Organic inter-conversions , Propene to 1-nitropropane,ethane to bromoethane, ethanol to but-1-yne, Propene to propyne, toluene to benzyl alcohol.
Why is carbon important for forming complicated molecules? Or why carbon makes a large number of molecules ?
The answer to this question is very simple . There are two major reasons behind it. 1. Catenation :- It is the property by which the carbon can make long chains, branched chains and ring or cylic structural by joining with its own atoms. Due to this it can make a variety of molecules. 2. Tetravalency :- carbon has 4 […]
Calculation of edge length and radius of atom.
Calculate the radius of copper atom if it crystallise in face centred cubic lattice and has a density of 8.93 g / cm cube. Solution Structure given = fcc For […]
Which set of elements has a strong tendency to form cations? Or which of the elements are the most electropositive elements?
The elements belonging to Group 1 and group 2 of periodic table has the strong tendency to form cations. The reason behind this tendency is that the elements belonging to group 1 and 2 have one and two valance electrons respectively. By loosing the valence electrons, they will aquire noble gas configuration. It is easy to release 1 and 2 […]
If I have hydrogen and oxygen so how can I get water back from both the gases?
The answer is simple just look at the combustion reaction of the hydrogen and you will get water.
Name stands on the sands
For how much time ? The name on sand Will keep on stand . How the name A name so small Will be grand . Will keep on stand A […]
Its never too late
We can if we wish, Returning is never so tough, It’s not mandatory, But it’s a choice, You can say openly, Who suppress your voice, And decision you make, Are not of iron, or steel, You can break them whenever you feel, And life is not a movie, Where you can rewind the reel, The time has its pace, Just […]
What are the methods of preparation of alcohols and phenols ?
The art of saying “goodbye”
Its never so easy to say goodbye. It takes a lot of courage To leave a gathering of friends. To leave is equally tough As the world is going towards […]
The fact you don’t know . #1
Why we add coolent in the radiator of car ? How does a radiator of car works? We all are familiar with the coolent that is normally used in radiators […]
The failure
yes we failed, tried our best. every scheme, every tect . but still we failed, from a long battle with time and mind. to sing a song, to do a […]
What are the tricks to learn reaction of sodium carbonate with hydrochloric acid?
There is a trick in learning this reaction I will make it very easy for you to learn and rewrite. Firstly see the reaction:- Na2CO3 + 2HCl → 2NaCl + CO2 + H2O Tricks to learn:– Firstly see the formula of carbonate its CO3 , this will be converted into CO2 , One oxygen of CO3 will attach to two […]
What will be the volume of water when it is heated from 0 degrees Celsius to 10 degrees Celsius?
According to CHARLES LAW “At constant pressure, The volume of a given mass of a gas increases or decreses by 1/273 of its volume at 0 ͦ degree C for every one degree centigrade rise or fall in temperature”. Vol at 10 = vol at zero + 10 x vol at zero/273
How many oxygen atoms are there in 90g of H2O molecule?
1 molecule of H2O has 1 atom of oxygen. Firstly we will calculate the number of atoms in 90g of H2O. we will explain it in two steps:- Step I:- No.of moles of H2O = given mass / molar mass No. of moles = 90/18 = 5 moles No. Of molecules = No. of moles x Avogadro number =5 x […]
How does the normality of a mixture equation change for different solutes?
Actually normality depends upon a simple formula that is :- Normality = Number of Gram equivalents / litre The term gram equivalents change as the valency of a substance changes . all the elements do not have same valence and hence it varies from element to element or molecule to molecule. And the term gram equivalents is calculated as follows […]
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 […]
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 […]
