When will the pages be re indexed by Google?

Is your question about A1 Sitemap Generator? (You posted in A1 Website Scraper forum)

Assuming so, there is no definie answer, but by creating and submitting an XML sitemap you help speed the process in various ways and can use Google Webmaster tools to inspect and follow results.

There are a few situations when Google re-indexed website is, When website content was updated and also when Major addition to the site, such as new service pages or launching a new product line.