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if the electon in hydrogen atom is exited to n=5 the number of diffrent frequency of radiations which may be exited is
Why a covalent bond is directional? Covalent bond is formed as a result of pairing of two electrons in atomic orbitals of two atoms. Bond then must lie along the direction of
At 673k co is best reducing agent beacause gibs free energy curve is greater.
How many types of colloidal system? and which are they?
#questionQ1. 0.28gm of CaCO3 was dissolved in HCl and the solution was made to one litre with distilled water. 100 ml of the above solution required 28 ml of EDTA solution on titra
list down example of spectroscopic methods based on interaction of matter electromagnetic radiation?
Q. Explain about Neutral and Amphoteric oxides? Neutral oxides have neither acidic nor basic properties and when dissolved in water, they give neutral solutions, e.g., CO, N
The hydride ions H- are isoelectronic with: (1) Li (2) He + (3) He (4) Be Ans: He
why lanthanides and actinides are known as inner transition elements
principle and explanation of radiometric titration
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