For some projects you may not want your respondents to use the back button to change answers on previous pages. You can set up your survey as "forward only" which will remove the survey back button:
1. Go to Tools > Response Settings.
2. Check the Forward-Only Survey option.
Check out our Remove the Back Button Tutorial to learn how to do this on a single page!
Would you rather hide answered questions on the same page? Take a look at the Hide After Answering feature (available for radio button questions). Finally, we have a script that can be used to Disable Radio Buttons Once Option is Selected.