Chemical Reactions and Equations_4By admin / August 15, 2025 Chemical Reactions Quiz Quiz Set 4 Chemical Reactions and Equations 1. What is the word equation for the burning of magnesium ribbon? a) Magnesium + Carbon → Magnesium Carbide b) Magnesium + Oxygen → Magnesium Oxide c) Magnesium + Water → Magnesium Hydroxide d) Magnesium Oxide → Magnesium + Oxygen 2. What is the state of matter of the ash collected from burning magnesium ribbon? a) Gas b) Liquid c) Solid d) Aqueous 3. On which side of a chemical equation are the products listed? a) Left-hand side b) Right-hand side c) Both sides d) In the middle 4. In the chemical equation $2H_2(g) + O_2(g) \rightarrow 2H_2O(l)$, what are the reactants? a) $H_2O$ b) $H_2$ and $O_2$ c) Only $H_2$ d) Only $O_2$ 5. What does the coefficient ‘2’ in front of $H_2$ in the equation $2H_2 + O_2 \rightarrow 2H_2O$ signify? a) Two atoms of hydrogen b) Two molecules of hydrogen c) The charge of hydrogen d) The mass of hydrogen 6. How many atoms of oxygen are on the left side of the equation $Fe + H_2O \rightarrow Fe_3O_4 + H_2$? a) 1 b) 2 c) 3 d) 4 7. Which symbol represents a gas produced in a chemical reaction? a) $\downarrow$ b) (l) c) $\uparrow$ d) (aq) 8. The formation of slaked lime from quicklime and water is an example of which type of reaction? a) Endothermic and decomposition b) Exothermic and combination c) Displacement and endothermic d) Double displacement and exothermic 9. What is the common name for $Ca(OH)_2$? a) Quicklime b) Limestone c) Slaked lime d) Baking soda 10. What type of reaction is the decomposition of silver chloride? a) Thermal decomposition b) Combination reaction c) Photochemical decomposition d) Redox reaction 11. What is the color of silver chloride? a) White b) Black c) Yellow d) Brown 12. What is the color of the silver metal formed from the decomposition of silver chloride? a) White b) Grey c) Green d) Blue 13. What is the chemical formula for lead nitrate? a) $PbO$ b) $PbCl_2$ c) $Pb(NO_3)_2$ d) $PbSO_4$ 14. In the reaction $Fe + CuSO_4 \rightarrow FeSO_4 + Cu$, which metal is more reactive? a) Copper (Cu) b) Iron (Fe) c) Both are equally reactive d) Cannot be determined 15. What is a key characteristic of a redox reaction? a) Only oxidation occurs. b) Only reduction occurs. c) Both oxidation and reduction occur simultaneously. d) A precipitate is always formed. 16. What is the chemical formula for hydrogen sulphide? a) $H_2SO_4$ b) $H_2S$ c) $HS_2$ d) $H_2SO_3$ 17. In the reaction $2H_2S + SO_2 \rightarrow 3S + 2H_2O$, which substance is getting reduced? a) $H_2S$ b) $SO_2$ c) $S$ d) $H_2O$ 18. Why is it important to balance a chemical equation? a) To make the reaction faster. b) To conserve energy. c) To obey the law of conservation of mass. d) To make the products more stable. 19. What happens to the taste and smell of fats and oils when they become rancid? a) They become sweet. b) They become unpleasant. c) They become odorless. d) They do not change. 20. Which method can be used to prevent rancidity? a) Exposing food to air b) Heating the food frequently c) Storing food in airtight containers or flushing with nitrogen d) Adding water to the food 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