
(a)
Interpretation: The information regarding the working of photo-gray lenses and the reactions involved in it are given. Various questions based on the material of photo-gray lenses have to be answered.
Concept introduction: Electronic configuration determines the electron distribution in an atom or a molecule. The entire periodic table is based upon the distribution of electrons in the atom.
To determine: The condensed electronic configuration of different given species.
(b)
To determine: The definition of excited state.
(c)
To determine: The comparison between the energy needed for the removal of electron from Bromide ion and Chloride ion.
(d)
To determine: The effect of substitution of

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Chapter 7 Solutions
Chemistry
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