Class 10 Science Chapter 1
13 Practice Questions — The answers are hidden. Reveal them to check your answers. The Timed Test will be available in Phase 3.
Correct option: B — Combination reaction
Combination (or synthesis) joins reactants into one product, e.g. C + O₂ → CO₂.
Correct option: B — Because mass is conserved in a chemical change
Atoms are rearranged, not created or destroyed — atom counts on both sides must match.
Correct option: B — Oxidation of iron in moist air
Iron combines with oxygen (and moisture) to form hydrated iron oxide — oxidation.
These practice sets use original GKSchools wording — they are not a verbatim dump of the NCERT textbook. “Important” means high-weight practice for the chapter, not a claim that these are previous-year exam questions.
Follow this loop every day: mixed test, current affairs, then today's subject. A new set arrives tomorrow.
After this page, use these three links — do not open a random page.
More sets from the same cluster — stay on this topic.
Timed papers with a scorecard — start any time, then return to a related quiz above.
