According to the given information, there are 8 exercises in NCERT Solutions for maths chapter 5 class 12 . The following is the number of questions in each exercise:

1. Exercise 5.1: 34 questions

2. Exercise 5.2: 10 questions

3. Exercise 5.3: 15 questions

4. Exercise 5.4: 10 questions

5. Exercise 5.5: 18 questions

6. Exercise 5.6: 11 questions

7. Exercise 5.7: 17 questions

8. Exercise 5.8: 6 questions

Additionally, there is a Miscellaneous Exercise with 23 questions.