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Anomalous behaviour of boron
5H is the most stable, and the least stable isotope is 7H
Q. Evolution of the Modern Atomic Model? Ans: The atomic models of Dalton, Thomson, Rutherford, and Bohr eventually evolved into the current-day Quantum Mechanical model of the
Which of the following compounds are covalent: (1) H 2 (2) CaO (3) KCL
how to neutralize sodium carbonate colourless soloution what is the soloution
Q. What are the Physical Properties of Halogens? Ans. The halogens exist as diatomic molecules held together by a single bond. Reactivity becomes less as you move down
the density of 2 molal aqueous solution of NaOH is 1.10g/L. Calculate the molarity of the solution.
An electron has principal quantum number 3. The number of its (i) sub-shells and (ii) orbitals would be respectively: (1) 3 and 5 (2) 3 and 7 (3) 3 and 9
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.
Being simultaneously basic and acidic, water undergoes autoprotolysis, also called self-ionization: The equilibrium constant is H3O+ in these equations is gene
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