As a researcher myself, I learned that there are things to consider in designing survey questions.Here are some of the things to consider
1.) Make sure that the questions are not researchable or the answers for these questions can't be answered by google or any website in particular.
2.) These survey questions should get all the complete information and details you needed for the research.
3.) Make sure that these questions doesn't offend, harass or attack your participants or anyone in particular.