Class 10 Science
17 Practice Questions — The answers are hidden. Reveal them to check your answers. The Timed Test will be available in Phase 3.
Correct option: C — Thermal decomposition
Heat splits lead nitrate into oxide, nitrogen dioxide and oxygen — thermal decomposition.
Correct option: B — Displacement
More reactive zinc displaces copper from CuSO₄. It is also a redox change.
Correct option: B — Oxidised
Magnesium gains oxygen (and loses electrons) so it is oxidised.
Correct option: B — 2H₂ + O₂ → 2H₂O
Two H₂ molecules need one O₂ to make two water molecules.
Correct option: B — 7
pH 7 is neutral at 25 °C; below 7 acidic, above 7 basic.
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.
