MCQ Chapter 4 Class 7 Science Curiosity NCERT Advertisement The World of Metals and Non-metals 1. What is the result of burning sulfur in air?Sulfur dioxide gasSulfur monoxide gasSulfur trioxide gasNo gas is formedQuestion 1 of 202. Which material is used to make the protective coating on iron to prevent rusting?CopperZincAluminiumSulfurQuestion 2 of 203. What is the nature of the solution formed when sulfur dioxide gas dissolves in water?BasicAcidicNeutralNone of theseQuestion 3 of 204. Which metal is used in suspension bridges due to its strength?CopperAluminiumSteelGoldQuestion 4 of 205. What is the appearance of metals like copper and aluminium?Non-lustrousLustrousDullBrittleQuestion 5 of 206. Which non-metal is used in the manufacturing of fertilisers?OxygenCarbonNitrogenChlorineQuestion 6 of 207. What happens to a wooden spoon when immersed in hot water compared to a metal spoon?It gets hotterIt transfers heat poorlyIt becomes malleableIt produces a ringing soundQuestion 7 of 208. Which material is used to make the handles of screwdrivers to prevent electric shock?CopperIronPlasticAluminiumQuestion 8 of 209. What is the primary reason iron objects develop brown deposits?Dry airWater onlyMoist airOilQuestion 9 of 2010. Which ancient Indian structure is noted for resisting rust for over 1600 years?Taj MahalIron Pillar of DelhiQutub MinarRed FortQuestion 10 of 2011. What is the purpose of silica gel in the rusting experiment?To add moistureTo make air dryTo heat the ironTo dissolve gasesQuestion 11 of 2012. Which metal is commonly used in electrical wiring?IronCopperGoldSodiumQuestion 12 of 2013. What is the effect of hammering on a lump of sulfur?It flattensIt breaks into piecesIt becomes ductileIt remains unchangedQuestion 13 of 2014. Which non-metal is applied on wounds as an antiseptic?ChlorineSulfurIodineNitrogenQuestion 14 of 2015. What is the primary difference between metals and non-metals in terms of conductivity?Metals are poor conductorsNon-metals are good conductorsMetals are good conductorsBoth are equally conductiveQuestion 15 of 2016. Which metal is mentioned as being used in aerospace technology?ZirconiumTitaniumIronCopperQuestion 16 of 2017. What is the effect of adding water to sulfur powder?It forms a gasIt reacts vigorouslyNo reaction occursIt forms an acidQuestion 17 of 2018. Which material is not classified as a metal or non-metal because it is not an element?SulfurPlasticCarbonOxygenQuestion 18 of 2019. What is the primary reason copper was discovered earlier than iron?Copper is strongerCopper is more malleableCopper was easier to find and work withCopper is more conductiveQuestion 19 of 2020. Which metal is used in atomic energy applications?TitaniumZirconiumAluminiumIronQuestion 20 of 20 Loading...
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