Hafeez, i will be sharing my views on above some questions, not all. Since, i have not covered all of them during my preparation.

Discuss the trends and causes leading to the expansion of federal government’s power in the U.S.
The expansion of federal government's power in the US is characterized by certain trends that include, dual federalism, cooperative federalism, and new federalism (or you may say contemporary federalism). However, the causes that led to the expansion of federal government's power are, establishment of the bank of the US, McCulloch vs. Maryland case, Gibbons vs. Ogden and the civil war, to name a few. (You may find more on the internet its just a rough conceptual outline i just told you).

What is the variance between the Treaties of Paris in 1763 and 1783? Elaborate their significant effect on the US.
This question is just indirectly asking about impacts of Treaty of Paris, 1763 and Treaty of Paris,1783. And also the difference between them. In the former, you just need to highlight impacts of French-Indian war. Since the treaty, concluded the (mentioned) war and gave control to British. While, in the latter part, you just have to mention impacts of War of independence had on the Americans. Because the treaty of 1783, declared American independence from the British.

The other two questions i did not find important to cover during my preparation. And, if your concept is not clear you may ask.

Which book are you consulting for US history?

I use R.K. Majumdar's and google books for history portion, and for contemporary internet.

Dear Dream, thanks for your brief outline. And, what about the question that i posted earlier about Westward expansion. How to handle this question?

To tackle this, you need to cite events like Louisiana purchase, Texas annexation, Mexican cession and such relative events to answer this question.

I am also reading same book. Are you making notes too?

Thanks dear, post some more questions of past papers and come up with outline.

we should discuss past questions' concepts (whenever anything is unclear to anyone preparing the subject) and carry on view sharing, instead of posting outlines-which seems unproductive to me. Conceptual views sharing will help us in enhancing our concepts and expose us to new ideas as well.
And, outlines can be done when a question is vague to all so we can post to clarify our attempts.

How's your preparation going? you were to appear in CE-21.

P.S. all threads are dead, are we into hibernation?