Chemistry Mcqs 15
Which of the following is a noble gas? Oxygen NitrogenNeonHydrogenC) Neon: Neon is one of the noble gases.
Which vitamin is known to prevent scurvy?Vitamin AVitamin BVitamin CVitamin DC) Vitamin C Vitamin C deficiency causes scurvy.
. Which of the following metals is used to galvanize iron?CopperZinc Lead Silver B) Zinc Zinc coating protects iron from rusting.
Which part of the atom contains neutrons?NucleusElectron cloud Proton shellOuter orbitA) NucleusNeutrons are located in the nucleus.
Which of these is a chemical change?Melting of ice Boiling of waterRusting of iron Breaking of glassC) Rusting of iron Rusting is a chemical reaction.
What is the chemical formula for methane?CH3CH4C2H4C2H6B) CH4: Methane’s formula is CH4.
Which of these elements is a halogen? Oxygen ChlorineHelium Sodium B) ChlorineChlorine is part of the halogen group.
Which metal is used in making railway tracks?AluminumCopperIron SilverC) Iron Iron (steel) is used for railway tracks.
What is the formula of plaster of Paris?CaCO3CaSO4·1/2H2OCaSO4·2H2OCaO B) CaSO4·1/2H2O Plaster of Paris is calcium sulfate hemihydrate.
Which gas is essential for photosynthesis? Oxygen Carbon dioxideNitrogenHydrogenB) Carbon dioxide Plants use CO₂ for photosynthesis.
Which gas turns limewater milky?OxygenCarbon dioxide HydrogenNitrogen: B) Carbon dioxideCO₂ reacts with limewater to form calcium carbonate, making it milky.
What is the main ore of aluminum?MagnetiteBauxiteHematiteGalenaB) Bauxite Aluminum is extracted from bauxite ore.
Which acid is present in ant stings?Hydrochloric acidSulphuric acidFormic acidAcetic acid C) Formic acidAnt stings release formic acid
Which of the following is not a mixture? AirSalt solution Pure waterMilkC) Pure water Pure water is a compound, not a mixture.
Which element is used in making filaments of bulbs?Iron TungstenCopperAluminumB) TungstenTungsten can withstand high temperatures in bulbs.