State Sen. John Liu chided Mayor Eric Adams Friday for his hasty exit from a hearing on City Hall’s control of the nation’s largest school system.

Adams appeared on the Zoom meeting from the back of an SUV and offered brief remarks before logging off due to “pre-existing engagements.”

Adams handed the baton to schools Chancellor David Banks to field questions from the panel.

“I guess I’m a little bit appreciative that the mayor showed up for a few minutes at the beginning of our hearing — disappointed that he’s not here to answer questions from our fellow legislators,” Liu said after Adams left.

The departure prompted Liu to conjure the specter of former Mayor Bill de Blasio as an exemplar of diligence and accountability in comparison.

“So as we deliberate this topic it would seem like it would be appropriate and possibly responsible for the mayor to actually be at this hearing — as the previous mayor, Bill de Blasio, was when he answered hours of questions from fellow legislators.”

In response, Banks was quick to note that Adams left because he had to make a highly anticipated announcement on school mask mandates.

“I wouldn’t take the mayor’s inability to remain in the meeting on this Zoom with the legislators as any form of disrespect,” Banks said. “He and I talk about this issue at length and I’m sorry that he in fact had some other engagement that kept him away from us.”

In his opening remarks, Adams pushed for the body to approve mayoral control for an additional four years.

He noted that he will be the first black mayor to operate under the system — and pledged to elevate city schools along with Banks.