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Science · 2026 · 3 marks
CBSE 2026 · Region 3 · Set 3 · Q26
Define the following terms: 3 × 1=3 (i) Corrosion (ii) Rancidity (iii) Exothermic reaction
Define the following terms : $\displaystyle 3 \times 1=3$
(i)
Corrosion
(ii)
Rancidity
(iii)
Exothermic reaction
Marking-scheme solution
(i) The process in which a metal is attacked by substances around it such as moisture, acids etc.
(ii) Oxidation of fats and oils present in food resulting in change of its smell and taste.
(iii) Reaction in which heat/energy is released along with the formation of products.
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.