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The hydride ions H- are isoelectronic with: (1) Li (2) He + (3) He (4) Be Ans: He
Atomic fluorescence spectrometry: In atomic fluorescence spectrometry, the gaseous atoms acquired through flame or electrothermal atomisation are excited to higher energy leve
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Q. Define the Normality of solutions? Ans. Sometime normality is used to measure concentration. Normality (abbreviated N) is the number of gram-equivalent masses of solute in 1
Which of the following has the maximum number of unpaired electrons: (1) Mg 2+ (2) Ti 3+ (3) V 3+ (
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Purification of organic compounds Several methods are available for the purification of substances. Though, the selection of method, depends upon the nature of substance (if s
Q. Use of Halides of Boron? Boron trihalides of the type BX3 exist for all the four halogens. Boron trifluoride can be prepared on a large scale by the fluorination of boric ox
Why is the total energy of a many-electron atom not equivalent to the sum of the orbital energies for every electron?
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