The day's proceedings started on a promising note when 25-year-old Pune-based armyman Bhokanal ended up third in the first heat of the day by finishing the 2000m race in 7 minutes, 21.67 seconds behind Angel Fournier Rodriguez of Cuba (7:06.89) and Mexico's Juan Carlos Cabrera (7:08.27).
Bhokanal, who had qualified for the Games with a silver medal finish in the Asia-Oceania qualifier, was in second place for the first 500 metres of the race but started to lag behind once the Mexican in lane 2 picked up the pace around the 700 metres mark.
Even as there was some rejoicing in the Indian camp over the army rower's performance, there were setbacks from the shooting range, which provided the country with two medals in the 2012 London Games, with the elimination of the two women shooters.
Chandela shot an overall 411.6 to finish 34th out 51 competitors while Paul finished further down in 47th place with a total score of 403 in the 10m air rifle event in which China's Li Du set a new Olympic record of 420.7 to top the qualification stage.
23-year-old Chandela had secured an Olympic berth for her country by finishing third in the 10m Air Rifle in the 2015 ISSF World Cup in Changwon, Korea. Later in the year, Chandela had won silver in the World Cup Final held in Munich.
Paul, who is also 23, had won an Olympic quota for India with a silver in the Asian Olympic Qualifying Competition in January.