MCQ Chapter 13 General Science Class 8 Maharashtra Board MCQ For All Chapters – General Science Class 8Chemical Change and Chemical Bond 1. What is the primary difference between a physical and a chemical change?Physical change alters composition, chemical change does notChemical change alters composition, physical change does notPhysical change releases gas, chemical change does notChemical change is reversible, physical change is notQuestion 1 of 202. Which of the following is a physical change?Ripening of mangoMelting of iceBursting of firecrackersDarkening of a cut potatoQuestion 2 of 203. What observation indicates a chemical change when baking soda is added to lemon juice?The mixture turns blueBubbling occurs around the soda particlesThe glass becomes coldThe liquid remains colorlessQuestion 3 of 204. What gas is released when citric acid reacts with sodium bicarbonate?OxygenHydrogenCarbon dioxideNitrogenQuestion 4 of 205. In a chemical equation, where are the reactants written?On the right side of the arrowAbove the arrowOn the left side of the arrowBelow the equationQuestion 5 of 206. What type of reaction occurs when citric acid reacts with sodium bicarbonate?CombustionNeutralizationPhotosynthesisRespirationQuestion 6 of 207. Which of the following is a product of respiration according to the document?GlucoseOxygenCarbon dioxideSodium chlorideQuestion 7 of 208. What happens to lime water when carbon dioxide is blown into it?It turns blueIt becomes milkyIt remains colorlessIt evaporatesQuestion 8 of 209. What is the role of sunlight in photosynthesis?It acts reactantIt provides energy for the reactionIt is a productIt cools the plantQuestion 9 of 2010. Which substance is a reactant in the combustion of fuels?Carbon dioxideWaterCarbonCalcium carbonateQuestion 10 of 2011. What is one product formed when Shahabad tile is cleaned with hydrochloric acid?Sodium chlorideCalcium chlorideGlucoseOxygenQuestion 11 of 2012. How is hard water softened using washing soda?By evaporating the waterBy forming a precipitate of carbonate saltsBy adding more calcium chlorideBy heating the solutionQuestion 12 of 2013. What is a chemical bond?A physical force between atomsAn electrostatic force or sharing of electrons forming new substancesA temporary attraction between moleculesA change in color of a substanceQuestion 13 of 2014. What type of bond is formed between sodium and chlorine in NaCl?Covalent bondHydrogen bondIonic bondMetallic bondQuestion 14 of 2015. How many electrons does sodium have in its valence shell before forming NaCl?2187Question 15 of 2016. What is the valency of chlorine in NaCl?1278Question 16 of 2017. How many ionic bonds does magnesium form in MgCl₂?1234Question 17 of 2018. What type of bond is formed in a hydrogen molecule (H₂)?Ionic bondCovalent bondElectrovalent bondDouble bondQuestion 18 of 2019. How many electrons are shared in one covalent bond?1234Question 19 of 2020. What completes the octet of oxygen in an H₂O molecule?One hydrogen atomTwo hydrogen atomsThree hydrogen atomsFour hydrogen atomsQuestion 20 of 20 Loading...
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