Aromatic Hydrocarbos
In this post, I am sharing the Class 12 Chemistry Notes Chapter 9 Short Questions PDF for the students of FSC 2nd Year. The name of this chapter is Aromatic Hydrocarbos. Students can download the 12th Chemistry Chapter 9 Short Questions Notes in PDF format on their laptops or mobile. These Chemistry Notes are for the FSC Part 2 students of all boards working under the Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Khan Board, and Sahiwal Board. Here are the complete FSC 2nd Year Chemistry Notes PDFs of all chapters.
Why melting and boiling points of elements belonging to groups VA to VllA are lower? Discuss the trend of ionization energy in the periodic table.
When we move from left to right in a period the number of electrons go on increasing in the outermost shell. The tendency to un-pair the electron increases up to group lVA. In this way, the binding forces increase, hence melting and boiling points increase up to group lVA. After that, the pairing of electrons starts and binding force becomes less. That’s why, the melting and boiling points of elements belonging to groups VA to Vlla are lower.
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Relevant Notes:
- 12th Class Chemistry Chapter 8 Notes
- 12th Class Chemistry Chapter 8 Short Questions
- 12th Class Chemistry Chapter 8 Solved Exercise
