The students, all in the age group of six and 16 years, complained of nausea after eating the biscuits distributed to them on conclusion of Independence Day functions in a school in Harduaganj police station area, police said.
They were rushed to the neighbouring Deen Dayal Hospital where they were treated, they said.
The children are now out of danger, police said adding that the biscuits which were distributed had crossed its expiry date.