eLitmus does not share any previous year/sample question papers.
You can refer any standard MBA entrance exam material/aptitude material while preparing for the pH test. Also, the eLitmus pH Test is a test of natural ability. So unlike in case of other employability tests or CAT etc, where you can ■■■■■ the test through preparing and learning the cheat formulae, in case of the eLitmus pH Test any preparation which does not improve your ability would be futile, as this test is purely conceptual.