Avoiding overuse of idioms in academic writing — IITM BS previous year questions

Avoiding overuse of idioms in academic writing is part of Phrases vs Idioms - Usage in Real Contexts, Week 3 in English 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.