Qualitative Chemistry - QS Study
QS Study

What is Sublimation?

In a process by which if a solid substance is changed into vapour directly by heating and that vapour can also be changed into solid then......

Laboratory Preparation of Phosphorus Acid

Phosphorus Acid (H3PO3) is prepared by the action of cold water on phosphorus (III) oxide or phosphorus (III) chloride. P2 O3 + 3H2O → 2H3PO3 PCl3......

How Chlorine can be identified in Organic Compound?

Chlorine can be identified in Organic Compound: In the solution of chloride salt silver nitrate is added and white precipitate of AgC1 is formed. Produced precipitate......

Describe Principle of Fractional Distillation

Principle of Fractional distillation Normally the composition of vapour of any liquid mixture does not remain equal to the composition in liquid state. The more......

Which one is better for Crystallization Slow Cooling or Quick Cooling?

In crystallization process if we use slow cooling then we can find bigger crystal than if we use quick cooling. In quick cooling process we......

Use of Infrared Radiation (IR) in Medical Science

Use of Infrared Radiation (IR) in medical science: For determination of cancer: For all types of cancer, general cell of body increases irregularly. Temperature increases......

Laboratory Preparation of Phosphorus Pentoxide

Phosphorus pentoxide P2O5 or P4O10 can be prepared by burning phosphorus with sufficient supply of air. P4 + 5O2 →P4 O10   Physical properties It is......

Laboratory Preparation of Phosphorus Trioxide

Phosphorus trioxide (P2O3 or P4O6) is obtained by the combustion of phosphorus in a limited supply of air. 4P + 3O2 → 2P2O3 Physical properties It......

Why Line Spectrum is Unique Character of an Atom?

Line spectrum is created by transferring excited electron from one energy level to another. Where atom of every molecule has individual electronic configuration and electron......

Describe Limitation of Bohr’s Model

Limitation of Bohr’s model: Bohr’s model of an atom could not explain the line spectra of atoms containing more than one electron called multi-elctron atoms.......

Laboratory Preparation of Phosphorus Pentachloride

Preparation: Phosphorus pentachloride (PCl5) is usually prepared by the action of an excess of chlorine on phosphorus trichloride. PCl3 + Cl2 → PCl5   Physical......

Laboratory Preparation of Phosphorus Trichloride

Preparation: Phosphorus Trichloride (PCl3) is prepared by heating white phosphorus in a current of dry chlorine. P4 + 6Cl2 → 4PCl4 Dry white phosphorus is......