gcse science questions

so whenever i'm doing a past paper i'm always seeing long chemistry questions with random substances and it's actually so confusing. someone pls explain how i should answer unfamiliar context questions??🙏

Every question that comes up on the paper will be in the spec, even contextual will be mentioned as “students should be able to evaluate the uses between x and y” so its important to check in which evaluation skills are tested, and then i would go to websites such as save my exams and make a 6 marker answer for the question. However, its crucial to consider whats given in the question as sometimes you cant always gain marks by just talking about own knowledge but if u have a good knowledge of topics it will be dead easy to make up the answer. If u r aiming for 9s and 8s give an evaluation at the end with reason.