The extra 15 minutes provided before the commencement of the examination should be used wisely.
Remember that you do not have to attempt the questions in any particular order. You can attempt the questions in any order you wish.
Underline keywords in the answer but make sure not to overdo them as this may reduce the clarity of your answer.
If a student has answered both the options in an 'Or' question, the examiner will not consider the first question.
Whenever you need to cross out a word or answer, simply draw a line with your pen over that text/word.
Write precise and concise answers to the questions. Writing irrelevant answers will not help you score marks.
Since there is no negative marking, try to attempt all questions. Always refer to the formula and all the relevant steps while answering any numerical-based question.
Before handing over your answer sheet to the examiner, make sure to cross-check it once again.
The CBSE website provides Best Answer Scripts of previous years, which you can download and refer to for guidance on how to write impressive answers.