Chemical Reactions and Equations_5By admin / August 15, 2025 Chemical Reactions Quiz Quiz Set 5 Chemical Reactions and Equations 1. What is the source of energy for the decomposition of silver bromide? a) Heat b) Light c) Electricity d) A catalyst 2. In the reaction $2H_2(g) + O_2(g) \rightarrow 2H_2O(l)$, what is the physical state of the product? a) Solid b) Liquid c) Gas d) Aqueous 3. What does the symbol `(s)` denote in a chemical equation? a) Solid b) Liquid c) Gas d) Aqueous 4. In the electrolysis of water, the volume of which gas is double the volume of the other? a) Oxygen b) Hydrogen c) Carbon dioxide d) Nitrogen 5. What is the reaction of quicklime with water commonly known as? a) Neutralization b) Slaking of lime c) Electrolysis d) Oxidation 6. What is the color of the precipitate formed in the reaction between lead nitrate solution and potassium iodide solution? a) Yellow b) White c) Blue d) Green 7. What type of reaction is the precipitation of barium sulphate? a) Combination b) Decomposition c) Single displacement d) Double displacement 8. What is the chemical formula for barium chloride? a) $BaCl$ b) $Ba_2Cl$ c) $BaCl_2$ d) $Ba(ClO_3)_2$ 9. What is the common name for calcium oxide? a) Slaked lime b) Quicklime c) Limestone d) Gypsum 10. What type of reaction involves one reactant being oxidized and another being reduced simultaneously? a) Decomposition reaction b) Combination reaction c) Redox reaction d) Neutralization reaction 11. In the reaction $CuO + H_2 \rightarrow Cu + H_2O$, which substance is oxidized? a) $CuO$ b) $H_2$ c) $Cu$ d) $H_2O$ 12. What is the main component of a rusting iron article? a) Iron(II) oxide b) Iron(III) chloride c) Hydrated iron(III) oxide d) Iron carbonate 13. What are the two essential conditions for the rusting of iron? a) Presence of oil and salt. b) Presence of oxygen and water. c) Presence of acid and light. d) Presence of heat and a catalyst. 14. How can the rancidity of food items be slowed down? a) By exposing them to oxygen. b) By storing them in airtight containers. c) By increasing the temperature. d) By adding water. 15. What type of reaction is the digestion of food in our bodies? a) Combination reaction b) Decomposition reaction c) Displacement reaction d) Double displacement reaction 16. What is a key characteristic of a displacement reaction? a) A more reactive element displaces a less reactive one. b) Two compounds exchange ions. c) Two or more reactants combine to form a single product. d) A single reactant breaks down into simpler products. 17. In the reaction of iron nails with copper sulphate solution, what is the color of the solution after the reaction? a) Deep blue b) Colorless c) Light green d) Yellow 18. What is the chemical formula for copper sulphate? a) $CuCl_2$ b) $CuO$ c) $CuSO_4$ d) $Cu(NO_3)_2$ 19. When zinc granules react with dilute sulphuric acid, what is the gas produced? a) Oxygen b) Sulphur dioxide c) Hydrogen d) Carbon dioxide 20. What is the chemical name for the compound that is a “shiny brown coloured element ‘X’”? a) Iron b) Gold c) Silver d) Copper Submit Answers Retake Quiz Your Score Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X
Chemical Bonding Fundamentals and Study Leave a Comment / Chemical Bonding, Class 10 Chemistry / By admin
Chemical Reactions and Equation: Fundamentals Leave a Comment / Chemical Reactions & Equations, Chemical Reactions and Equations, Class 10 Chemistry / By admin