When and where was the Central Electrochemical Research Institute established with the efforts of Alagappa Chettiar, Dr Shanti Swaroop Bhatnagar and Pt. Jawahar Lal Nehru?
Answer key: official UPPSC key
Partial paper: 139 of 150 questions · 5 questions deleted from the official key are absent · q99 excluded key option conflict · unexplained gaps 112 127 149 150 · keys litigated q31 q62 q105