How does the electronic configuration of ions vary with the configuration of their isoelectronic atoms. Explain by taking two examples. Indicate the electronic configuration of ions along the series.
ons configuration is written after the removal of valence(outermost) electrons, hence being different than the atom
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In which cases is hydrometallurgy applicable? In such cases, how are the leached out
metals recovered from solution? Explain with suitable examples.
Although the 4s orbitals are occupied before 3d orbitals, yet we cannot say that they are always more stable. Explain with suitable examples.
Write the reactions for the following:
i) Reaction showing acidic behaviour of sulphur dioxide
ii) Reaction depicting the sulphonation by H2SO4
iii) Reactions of lead chambers during the manufacture of H2SO4 by Lead Chamber process
iv) Reaction distinguishing between peroxomonosulphuric acid and peroxodisulphuric acid
v) Reduction reaction of H2O2 with chlorine
Give the names of any two alloys of aluminium which have some amount of copper or magnesium. How are these more advantageous than pure aluminium?
Why do the hydrides of O and F in Group 16 and Group 17 respectively show abnormally high melting points and boiling points as compared to other hydrides in their respective groups? Explain.
Write down the names of the following complexes:
i) 
ii) [CoCl (NO2) (en)2] Cl
iii) K2(PtCl6]
Which metals are called class ‘a’ elements or ‘hard acids’ and why?