List of top Questions asked in ICSE Class X board- 2026

Select and write the two biodegradable wastes from the given list: Styrofoam, Metallic cans, Decaying fruits, Plastic bottles, Newspapers
A 17-year-old girl was having irregular menstrual cycle. Her mother took her to their family physician. She was diagnosed with Adrenal Virilism. Study the picture given below and answer the following questions. (a) Hypersecretion of which hormone results in Adrenal Virilism in human females?
(b) Mention one symptom of this disorder.
Differentiate between Mitosis in plant cell and animal cell based on Cytokinesis.
Sara placed a healthy potted plant in a dark room for 48 hours to perform an experiment on photosynthesis. She plucked one of the leaves and tested it for starch. The leaf did not turn blue-black on adding Iodine solution. (a) Name the structure.
(b) Label Gray matter and White matter.
Write the overall chemical equation for photosynthesis.
Expand the abbreviations: (a) NADP
(b) ADP
(a) NADP
(a) Explain the term Synapse.
RBCs do not have nuclei. Discuss its advantage.
Arrange the following food chains in a proper sequence. (a) Small fish, Algae, Mosquito larvae, Kingfisher
A 28-year-old pregnant lady goes to a gynecologist for a check-up. Her doctor explains that there is normal growth of the foetus and the placenta is functioning well.
Mention any two secondary sexual characteristics in a 15-year-old boy.
Explain the term 'Population Density' with reference to human beings.
What is the scientific name of modern man?
How are the Cytons and Axons of neurons arranged in the following? (a) Cerebrum
(b) Spinal Cord
(a) Who proposed the theory of Natural Selection?
Name the organism which was used as an example to explain Industrial Melanism.
Differentiate between Plasmolysis and Deplasmolysis.
Choose the odd one out from the following terms and name the category to which the others belong:
The hormone responsible for this disorder.
The organ that secretes this hormone.
Which is the resting but metabolically active stage of the cell cycle?
Varun’s mother added plenty of salt to the mango pickle she made. This is to:
During which phase of the menstrual cycle does the endometrium shed?
The tropic movement wherein the tendrils of a pea plant twine around a support.
A defect in our eye in which some parts of the object are in focus while the other parts are blurred.