"sparked questions" is a correct and usable phrase in written English.
You can use it when referring to something that has caused people to ask questions. For example, "The new announcement sparked questions about how it would affect policy changes."
The lack of recordings in the heart of Moscow has sparked questions for authorities, who have claimed all cameras were working properly.
The rapidly accelerating crisis has sparked questions as to whether Greece may exit the 19-member Eurozone, in a potential move being dubbed Grexit.
It also sparked questions that have surfaced time and time again in many scandals, from Iran-Contra to Watergate, from the Pentagon Papers to the Clive Ponting affair.
Yet all the talks sparked questions from the children which showed they had been engaged and were considering each job role as a potential career path.
Glenn welcomed a renewed focus on the area in the wake of a bruising week of revelations that sparked questions over the game's probity.
The action by Mr. Obama immediately sparked questions of what constitutes an actual Congressional recess, the legality of Mr. Obama's move and the future of the Congressional confirmation process.
I cook one of Mark's favorite dinners weekly, and let it spark questions.
The tensions between Saudi Arabia and Iran was also sparking questions about the implications for oil production.
New South Wales police have spent more than $66m funding its sniffer dog drug detection unit since 2010, sparking questions over the program's effectiveness.
The leak of the directive is likely to spark questions about the legality of the operation and about whether state department diplomats are expected to spy.
However, Apple's emphasis on human curation is likely to spark questions about what will happen when the company – or competing platforms like Android – become the news.
