At the time of second wave of COVID-19 Pandemic, which institute had demonstrated the conversion of nitrogen generator into oxygen generator?

1. A

   IISc, Bengaluru

   (a) IISc, Bengaluru. The Indian Institute of Science did other Covid work; it is not the institute named for the nitrogen-to-oxygen generator conversion on this key.

2. B

   IIT, Bombay

   (b) IIT, Bombay. During the second Covid-19 wave in 2021, IIT Bombay demonstrated converting industrial nitrogen generators (pressure-swing adsorption plants) into oxygen generators for hospitals. That demonstration is the official key.

3. C

   IIT, Madras

   (c) IIT, Madras. Madras contributed other oxygen and medical innovations, not this named conversion in the paper’s key.

4. D

   IIT, Kanpur

   (d) IIT, Kanpur. Kanpur is another distractor campus, not the keyed institute.

Summary. Official key is (b) IIT, Bombay. The 2021 second-wave oxygen crisis pushed campuses to retune nitrogen PSA plants to enrich oxygen. Bombay’s demonstration is the fact the paper keys. IISc, Madras and Kanpur are neighbouring institutes, not this conversion. Medical oxygen is typically 93 percent-class PSA output, not industrial nitrogen.