Dear Student,
a. There were many factors that resulted in the disintegration of the Mughal empire
b. Weak political leadership after the death of Aurangzeb, and Nadir Shah invasion certainly became one of the major reasons.
c. Nadir Shah invaded India in 1739, He could easily defeat Mohammad Shah and capture Delhi
d. Nadir Shah was attracted towards India's wealth and sought to plunder it.
e. Mughal's weak political leadership and poor military capabilities resulted in the defeat of the Mughals and victory of Nadir Shah.
f. The Battle of Karnal resulted in one of the biggest casualties killing thousands, Nadir Shah crushed the Mughals and got control of the royal treasury.
g. He took away with him Kohinoor diamond and peacok throne as well, thus, exposing the weakness of the crumbling Mughal empire.
Regards