Science — CBSE Class 10 board question

The following events take place during photosynthesis in sequence:

1. Absorption of light energy by chlorophyll.
2. Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.
3. Reduction of carbon dioxide to carbohydrates.

Source: Chapter 5, Section 5.2.1 Autotrophic Nutrition

---

The examiner expects these three steps listed in order using the exact phrasing from the textbook. Writing them as a numbered list is ideal for a sequence-based question. Avoid mixing up step 2 and 3 — light reactions (splitting of water) come before carbon fixation (reduction of CO₂). Both marks are awarded for all three steps in correct sequence.