Prc Classes

13/07/2023

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km.

12/07/2023

In the reaction, sodium ethanolate reacts with chloroethane and ethoxyethane is produced. The by-product of the reaction is sodium chloride. Thus, Williamson synthesis of ether is an example of nucleophilic substitution.

10/07/2023

Ozone is found in the upper part of the atmosphere called stratosphere and it acts as a shield absorbing ultraviolet radiation from sun and so its depletion can lead to many diseases , such as aging of skin, damage to skin cells and various types of skin cancers.

08/07/2023

Infective stage of Plasmodium to human beings is sporozoite and it is formed in gut of female Anopheles mosquito.

07/07/2023

Significant figures are defined as the number of digits which is compulsory to give the accurate result of any experiment or a calculation. Significant figures are number of digits which is known reliably and also number which is uncertain. The accuracy increases when the number of significant figures increases.

07/07/2023

Linnaeus system of classification was mainly based upon morphological characters. A hierarchical classification system was proposed by Linnaeus. It consists of a hierarchy of taxa, from the kingdom to the species.

05/07/2023

04/07/2023

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