Hi Babita

CHS examination is conducted by BHU you can get previous year question papers of CHS examination by visiting the official page of BHU the link for the same provided below

http://bhuonline.in/old-qus-paper-set17.html

it's good that you want to practice previous year question papers of CHS, actually these papers are very helpful in your examination preparation, it papers will help you to understand the types of questions which are asked in exam, you will understand the important topics which are covered in the exam by practising them, you will also get to know your preparation level .

Good luck for your CHS examination.

Thankyou