“Identification of the Areas of Students Difficulties in Chemistry Curriculum at the Secondary School Level”, Int. J. Emerg. Trends Sci. Technol., vol. 4, no. 04, pp. 5071–5077, Apr. 2017, Accessed: Sep. 28, 2026. [Online]. Available: http://igmpublication.com/ijetst.in/index.php/ijetst/article/view/1008