The Chandigarh team, which has an all-win record in its pool matches, handed Oman their third successive defeat.
In the first session, all the action was confined to Oman half and the visitors were forced to resort to desperate defending as the local lads took a formidable 4-0 lead by half-time.
Striker Mobashir scored a brace for the winners, while Inder Mohan, Ramdin, and Jatinder also found the net.
In the girls' matches, Saiaithanga High School, Mizoram thrashed TAFFS 7-0.
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Last year's best female player scored a hat-trick for Mizoram, while Lalruatkimi, Lalabiakoiki and Elizabeth were the other scorers for the winners.
Meanwhile, B Revathi plundered seven goals as AP Sports School, Andhra Pradesh gave their campaign a flying start with a 14-1 thrashing of Fountainhead School, Gujarat.
After Anita had given AP the early lead, Revathi scored four goals in a span of a mere eight minutes to give her team a formidable 5-0 lead in just 15 minutes.
Tyssad School of Meghalaya edged out St Joseph of Tamil Nadu 3-2 in a hard fought clash, thanks to a hat-trick by Pynhum Sulhet.