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A mixture of iron filings and sand can be separated by
1 Heating
2 Sublimation
3 Hand picking
4 Magnetic separation
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In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
Which of the following shows the masses of three elementary particles in decreasing order? 1 Mesons, Baryons, Leptons 2 Leptons, Baryons, Mesons 3 Baryons, Mesons, Leptons 4 Leptons, Mesons, Baryons
A mixture of salt and sand can be separated by 1 Sublimation 2 Dissolving in water 3 Gravity separation 4 Dry distillation
Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material? 1 Radium 2 Radon 3 Thorium 4 Plutonium
Which metal is used for Galvanisation of iron?
13 Answers ncert, TCS, TNPSC Tamil Nadu Public Service Commission,
Biological Sciences 
