ICSE Class 10 Photosynthesis — Mock Test (2027)
Free online mock test for Photosynthesis (ICSE Class 10 Biology) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Photosynthesis chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.Which of the following correctly balances the given incomplete chemical equation for photosynthesis: $$\mathrm{CO}_{2} + 12\mathrm{H}_{2}\mathrm{O} \xrightarrow{\text{Chlorophyll}} \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6} + \mathrm{O}_{2} + \mathrm{H}_{2}\mathrm{O}$$?
- A.$$6\mathrm{CO}_{2} + 12\mathrm{H}_{2}\mathrm{O} \rightarrow \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6} + 6\mathrm{O}_{2} + 6\mathrm{H}_{2}\mathrm{O}$$
- B.$$\mathrm{CO}_{2} + 6\mathrm{H}_{2}\mathrm{O} \rightarrow \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6} + 6\mathrm{O}_{2}$$
- C.$$6\mathrm{CO}_{2} + 6\mathrm{H}_{2}\mathrm{O} \rightarrow \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6} + 6\mathrm{O}_{2}$$
- D.$$\mathrm{CO}_{2} + 12\mathrm{H}_{2}\mathrm{O} \rightarrow \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6} + 12\mathrm{O}_{2} + 6\mathrm{H}_{2}\mathrm{O}$$
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2.Which of the following correctly states a key difference between photosynthesis and respiration?
- A.Photosynthesis is a catabolic process that breaks down glucose, while respiration is an anabolic process that builds glucose.
- B.Photosynthesis stores energy in glucose and occurs in chloroplasts, while respiration releases energy from glucose and occurs in mitochondria.
- C.Photosynthesis releases carbon dioxide and absorbs oxygen, while respiration releases oxygen and absorbs carbon dioxide.
- D.Photosynthesis occurs in all living cells, while respiration occurs only in plants and autotrophs.
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3.Oxygen given out in photosynthesis comes from the atmosphere.
- A.Yes
- B.No
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4.In certain experiments on photosynthesis, what chemical is used to remove CO₂ from inside a flask?
- A.Sodium chloride (NaCl)
- B.Potassium hydroxide (KOH)
- C.Calcium carbonate (CaCO₃)
- D.Hydrochloric acid (HCl)
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5.248. Plant is boiled in methylated spirit to
- A.to remove starch
- B.to remove chlorophyll
- C.to kill cells
- D.all of these
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