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Q. Explain about Magnetic Separation ?
This process is based on the difference in magnetic properties of minerals. If the ore but not the gangue is attracted by a magnetic field, it may be concentrated to-yield a sample which is rich in the metal. The pulverised mineral is passed over a rubber belt which goes on a pully in a magnetic field. The non-magnetic gangue particles fall off in a vertical position when the belt passes over the pully, but the magnetic ore clings to the belt. When the belt passes out of the influence of the magnetic field, the ore drops off. Magnetite (Fe3O4), haematite (Fe2O3), chromite (FeO.Cr2O3), wulfrarmite (FeWO4), and ilmenite (FeO.TiO2) are some of the minerals which are separated from non- magnetic impurities by this process.
The wave nature of an electron was first given by: (1) De-Broglie (2)Heisenberg (3)Mosley (4)Sommerfield Ans: De-Broglie
Which geometry does have Formaldehyde molecule The formaldehyde molecule has trigonal planar geometry. Therefore, both the H-C-H bond angle and the H-CAO bond angle are abou
how did the british discover this isotope on different things when they investigated the Litvenko murder
Physical properties of Trihydric alcohols (a) Trihydric alcohol is an odourless, viscous, colourless and hygroscopic liquid. (b) Trihydric alcohol has high boiling point tha
Classification of polymers - Linear polymers These are polymers where monomeric units are linked together to form linear sequential chain. These linear sequential polymers are
Electronic configuration of C is: (1) 1s 2 , 2s 2 , 2p 2 , (2) 1s 2 , 2s 2 , 2p 3 (3) 1s 2 , 2s 2 , (4) 1s 2 , 2s 2 , 2p 6
What are trihydric alcohols? What are their preparation methods? What are their physical properties?
Br2(g)=2Br(g) dG=161.69KJ/mol at 298.15K Find kc and kp.
principle and application
Benefits of flame photometry: The subsequent are the main advantages of flame photometry. It gives high sensitivity and high reliability for the determination of elemen
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