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 […]
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 […]
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 […]
The answer is simple just look at the combustion reaction of the hydrogen and you will get water.
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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
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 […]
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 […]
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 […]
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 […]