on line tutors in chemistry

When an opaque object like a metal cross is placed in the path of cathode rays in a discharge tube, a shadow of the metal cross is formed at the end opposite to the cathode...

A spectrum is an assembly of energy levels in the form of radiations emitted by an atom in its excited state. Every atom gives discontinuous line spectra. Each line in the spectra corresponds to a specific wavelength and it is unique to a given element. No two elements give same..

In this representation one views the carbon-carbon bond from an oblique angle. The spatial orientation are indicated by employing heavy tapered lines for substituents coming out of the page, normal lines for substituents in the plane of the page, and dashed lines for ..

Many polyhalogenated hydrocarbons find important use as industrial solvents, pesticides, refrigerants, medicines, inert lining of cooking utensils, etc. Some useful chloro compounds a..

Hydrogen is the simplest element with its atom having only one electron. Hence, the atomic spectrum of hydrogen has played a significant role in the development of atomic structure. In the emission spectrum of hydrogen, when an electric discharge is passed through hydrogen gas, the molecules of hy..

Polyhalogen Derivatives - Carbon tetrachloride - Many polyhalogenated hydrocarbons find important use as industrial solvents, pesticides, refrigerants, medicines, inert lining of cooking utensils, etc. Some useful chloro compounds a..

A mixture of cast iron, scrap iron, iron ore (haematite) and lime is melted in an Open Hearth Furnace. The hearth is lined with silica (SiO 2 ) or calcined dolomite (CaO.MgO) based on whether the impurities present in cast iron. If the impurities are manganese and silicon, silica ..

Chlorine is a very poisonous gas. It corrodes the delicate inner lining of the respiratory passage and the alveoli. This causes bleeding in the airspace of the alveoli, giving intense pain and ultimately causes death. In case of chlorine poisoning, breathing in alcohol vapor or ammonia va..

When the atomic vapours from a sample are placed in the path of white light from an arc lamp, it absorbs the light of certain characteristic wavelengths and the light of other wavelengths get transmitted. In such conditions a series of dark lines on a white background are formed. This is..

It is an isomer of anthracene. Instead of three rings in a line, as in the latter, phenanthrene has one of its rings removed from the line. As a result, many of the physical properties of the two are very similar. The major differences lie in the melting point and the propertie..