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plese give me awart sarni upto 200 nos
The hydride ions H- are isoelectronic with: (1) Li (2) He + (3) He (4) Be Ans: He
hbjk
The standard free energy change for a reaction is -212.3 kJ mol -1 . If the enthalpy of the reaction is - 216.7 kJ mol -1 , calculate the entropy change for the reaction.
Explain oriental polarisation. Orientational Polarisation: When two different atoms form a chemical bond, one of the two is more probable to part with one or more of valence
what is the m.p naphthalene,ammonia oxalate,citric acid ,naphthyl acetic acid
how do i draw an atom amd label it''s components
Alkaline earth metals: The elements Be, Mg, Ca, Sr, Ba and Ra belong to II A group. 2. II A group elements are also called alkaline earth metals. 3. The valence electron
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In a Bohr's model of atom when an electron jumps from n= 1 to n= 3 , how much energy will be emitted or absorbed: (1) 2.15 x10 -11 erg (2) 0.19
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