PU GS 2026 Chemical Reactions Free Quiz 2

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PU GS 2026 Chemical Reactions Free Quiz 2

PU GS Quiz

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Navigator 8 Q

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General 8 MCQs

11. What do exothermic reactions do?

A. Absorb heat B. Release light C. Absorb light D. Release heat

12. What do endothermic reactions do?

A. Absorb heat B. Release heat C. Release light D. Absorb light

13. What color does litmus turn in acid and base?

A. Blue in acid, red in base B. Red in acid, blue in base C. Red in both D. Blue in both

14. What is a chemical equation?

A. Uses only words B. Uses only numbers C. Uses diagrams D. Uses symbols and formulas

15. Rusting of iron is an example of which reaction?

A. Oxidation B. Reduction C. Neutralization D. Sublimation

16. Why is burning considered a chemical change?

A. Physical change B. No change C. Chemical change D. Temporary change

17. What is electrolysis?

A. Combining substances B. Using electricity to break down a compound C. Heat to break down D. Light to break down

18. What does the law of conservation of mass state?

A. Mass can be created B. Mass can be destroyed C. Mass changes constantly D. Mass is neither created nor destroyed

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