Is it legal for an employer to make an employee sign no talking contract?

Generally, it is not legal for an employer to make an employee sign a "no talking" contract that prohibits them from discussing certain topics, especially if it infringes on their rights to discuss workplace conditions or report illegal activities. Such contracts may violate labor laws or whistleblower protections. However, employers can impose confidentiality agreements or non-disclosure agreements regarding proprietary information, but these must be reasonable and clearly defined. Always consult legal counsel for specific situations, as laws vary by jurisdiction.