IB DP Chemistry SL Prediction Paper 1A and 1B for 2025 Exams
IB DP Chemistry SL Prediction Paper 1A & 1B- April/May 2025 Exam
IB DP Chemistry SL Prediction Paper 1A & 1B: Prepare for the IB exams with subject-specific Prediction questions, model answers. All topics covered.
Prepared by IB teachers: Access our IB DP Chemistry SL Prediction Paper 1 with model answer. Students: Practice with exam-style papers for IB DP Chemistry SL Exam
Question 1
Which species contains the same number of neutrons as 146C and the same number of electrons as 2311Na+?
Choose the correct option:
▶️ Answer/Explanation
Answer: D
Question 2
Which row shows the correct number of covalent bonds in a molecule of methylpropene?
Choose the correct option:
| Option | Total number of sigma (σ) bonds | Total number of pi (π) bonds |
| A | 10 | 1 |
| B | 10 | 2 |
| C | 11 | 1 |
| D | 11 | 2 |
▶️ Answer/Explanation
Answer: C
Question 3
Element X is in Period 3. Element X reacts with oxygen to produce a solid, Y. When solid Y is added to water, a solution with a pH of less than 7 is produced. What is the identity of element X?
Choose the correct option:
▶️ Answer/Explanation
Answer: C
Question 4
Determine the index of hydrogen deficiency (IHD) of paracetamol. 
Choose the correct option:
▶️ Answer/Explanation
Answer: C