Hello Ramesh, I acknowledge your question. As per the precedents that have been decided by various High Courts and Supreme Court and also in the case Smt. Savithri @ Savithramma vs State of Karnataka it was held that caste of a woman does not change with marriage, similarly you wife shall also deem to be under General category itself. The eligibility criteria for getting EWS Certificate are that the applicant must belong to General Category, the income shall not exceed 8 Lakhs and they should not have land exceeding 5 acres, they shouldn’t possess flat with an area of 1000sq.ft or more.
Coming to your question, yes, the wife shall be validly eligible to apply for such a certificate because she is dependent and also belongs to your family rather than her parents’ family.
I hope I have answered your question.
Have a good day.