Fiji's Manueli Tulo missed out on the podium after failing with his final clean and jerk attempt at 145kg. The other record Ahmed broke was by lifting 261kg. The day belonged to Mirabai and Gururaj.
Uganda's squash player Ian Rukunya won his game against Fiji's Stephen Henry to set up a Round of 16 tie.
Chanu, who was a silver medalist at Glasgow in 2014, lifted 26kg more than Mauritian Marie Hanitra Roilya Ranaivosoa, who sealed silver, while Sri Lanka's Dinusha Gomes won the bronze medal. Chanu started off on a rousing note by breaking the existing Games record with a lift of 80 kg. He failed in his first two attempts before managing a good lift on his last chance to zoom to the top half of the table.
Gururaja has made Indians proud as it is just day 1 of the Commonwealth Games. And the third position was taken by Sri Lanka's Lakmal Chaturanga. She also had a successful second attempt at the 88kg clean and jerk area.
But Pearson already knew her Games were over before they had begun.
The 31-year-old has been battling the nagging Achilles tendon complaint that threatened her participation in the Games on her native Gold Coast.
Ugandan boxer Semujju Kavuma lost his men's 64kg Round of 32 bout to England's McCormack Luke - the judges scoring 10-9 all through rounds one, two and three - in favour of the Briton. The former Asian medallist won on a unanimous decision.
Cheptegei told Xinhua news agency on Wednesday that he is giving his 100 percent to ensure he wins the country a gold medal in the 5,000m race.
"It's hard because this is the biggest thing for us squash players and I planned a lot over the a year ago and put in a lot of hard work". I had a big role to play.
"I guess you could call it grief".
Arthur qualified for the semi-finals of the men's 100 metres with a time of 56.52 seconds while Jackson qualified for the men's 50 metres butterfly with a time of 24.68 seconds. Sajan Prakash failed to even make the semifinals in the same event.
Home favorite Blair Evans clinched the bronze medal with a time of 4 minutes and 38.23 seconds.