Please help me in seo crawling issue
 

I developed a site in magento. I have 100 products in one category. And 24 products are showing on each page... After that user have to click on page 2 for more 24 products. For example abc.com/xyz.html is a page of my category. But after 24 products its shown abc.com/xyz.html?xyz=2 and Google is showing another URL when I search any keywords its shown abc.com/xyz.html?xyz=2 is it bad for seo??