05 NOV 2020 (People & Environment) 1st and 2nd Shift NTA UGC NET JRF Question paper, Answer key
1. ‘Solar water still’ is a device to: 1. Produce potable water by using solar energy. 2. Pump water by […]
1. ‘Solar water still’ is a device to: 1. Produce potable water by using solar energy. 2. Pump water by […]