I asked a question related to chemistry and it went to the category bellow, Yahoo >ProductsYahoo Mail>Sending and Receiving Messages. So the probability of getting a good answer is very low.It has been 15 hours and still i didn't get any answer. I want to know how to change the question category.
Moving your question can be done by clicking Edit (pencil icon for mobile)>Edit category just beneath your question, then selecting the category that's appropriate for the topic
If you post a question go to your question, click 'Edit' and then select 'Edit Category'. You will see a list of categories and can move it where you want it.
Click on "edit" and you will see an option to change the category. You can then select a new category from the menu. I suppose Science & Technology > Chemistry would be the most appropriate category for your question.