MCQ Chapter 4 Class 7 Science Curiosity NCERT Advertisement The World of Metals and Non-metals 1. What is the property called when materials can be beaten into thin sheets?DuctilityMalleabilitySonorityConductivityQuestion 1 of 202. Which metal is mentioned as being in a liquid state at room temperature?SodiumPotassiumMercuryAluminiumQuestion 2 of 203. What is the term for the ringing sound produced by metals?MalleabilityDuctilitySonorityBrittlenessQuestion 3 of 204. Which material is described as not being malleable or brittle?CopperSulfurWoodCoalQuestion 4 of 205. What is the primary material used by ironsmiths to make items like flat pans and buckets?WoodIronCoalSulfurQuestion 5 of 206. Which non-metal is stored in water because it catches fire when exposed to air?SulfurPhosphorusCarbonNitrogenQuestion 6 of 207. What is the process called when iron develops brown deposits due to moist air?CorrosionRustingMalleabilityConductionQuestion 7 of 208. Which metal is noted as being so soft that it can be cut with a knife?IronCopperSodiumAluminiumQuestion 8 of 209. What property allows metals to be drawn into wires?MalleabilitySonorityDuctilityConductivityQuestion 9 of 2010. Which metal is used to make thin foils for wrapping food items?GoldAluminiumIronCopperQuestion 10 of 2011. What is the nature of the oxide formed when magnesium burns in air?AcidicBasicNeutralNone of theseQuestion 11 of 2012. Which non-metal is essential for respiration?NitrogenOxygenSulfurCarbonQuestion 12 of 2013. What happens to a piece of coal when beaten with a hammer?It flattensIt breaks into piecesIt remains unchangedIt becomes ductileQuestion 13 of 2014. Which material is used for the handles of cooking vessels to prevent heat transfer?CopperIronWoodAluminiumQuestion 14 of 2015. What is the name of the process where metal surfaces deteriorate due to air, water, or other substances?RustingCorrosionMalleabilitySonorityQuestion 15 of 2016. Which metal is stored in kerosene to prevent reaction with oxygen and water?IronSodiumCopperAluminiumQuestion 16 of 2017. What type of sound is produced when a metal coin is dropped on the floor?Dull soundRinging soundNo soundVibrating soundQuestion 17 of 2018. Which non-metal is used in water purification?CarbonNitrogenChlorineSulfurQuestion 18 of 2019. What is the primary component of proteins, fats, and carbohydrates?OxygenCarbonNitrogenSulfurQuestion 19 of 2020. Which metal is described as the most malleable?AluminiumCopperGoldIronQuestion 20 of 20 Loading...
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