Long time back, there was a trend in school education. To raise the level of standard in high schools, the set theory, calculus, PERT, optimization etc. were introduced right in the 8th standard classes. Later, they were shifted to higher classes.
By comparison with other developed countries, our +2 education is as good as or even better than that in many countries. However, we have to give more importance for clear concepts. This is what is being wanted now by CBSE and IIT's.
Yet, when we compare the eleventh and twelfth chemistry text books with the twelfth physics text, there is a glaring difference between the two. While Bohr Atom Model is treated in the twelfth class in physics, right in the eleventh class, quantum mechanical model, hybridization and chemical bonding are studied in chemistry. When one talks of atomic wave functions, atomic and molecular orbitals and probability densities, there
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