OAS Prelims-2020 Daily Practice Set-11/05/2020

Paper:   General Studies Paper-I Section:  General Science Topic:  Chemistry Q1. The pure form of carbon is:a) diamondb) graphitec) Charcoald) none of the above Q2. The polymeric fibres used as a substitute for wool in making synthetic blankets, sweaters, etc is:a) Nylonb) teflonc) orlond) bakelite Q3. The teflon plastic is prepared by the polymerisation of:a) Ethyleneb) …

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Radioactivity

What is Radioactivity? A phenomenon of spontaneous disintegration. First observed in certain naturally occurring heavy elements like- radium, actinium, uranium, thorium, etc. with emission of alpha, beta and Gamma rays. It is the property of nuclide to disintegrate in which a transformation takes place of a relatively stable nuclide accompanied with the emission of particles …

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